MAT 510 Final Exam (3 Set, 100% Score)

For more classes visit www.snaptutorial.com MAT 510 Final Exam Set 1 Question 1 Improvement is needed for an organization to survive because: Question 2 The Statistical Thinking Strategy has significant commonality with the scientific method. Which of the following statistical thinking principles is NOT generally associated with the scientific method? Question 3 Viewing a business as a system is important because: Question 4 Improving the quality of process measurements is: Question 5

Suppose the Problem Solving Framework were used to attack a problem where the process in question was inherently stable. Which of the following would be a likely result of this effort? Question 6 The histogram below showing ages of credit card holders displays what type of distribution? Question 7 A main purpose of a control chart is to: Question 8 The histogram has which of the following limitations?

Question 9 Non-random and unpredictable patterns on a control chart indicate: Question 10 A comparison between the Cp and Cpk for a process would find which of the following to be true? Question 11 A statistic that is used to indicate too much correlation between the predictors in a regression analysis is called the:

Question 12 An Adjusted R-square value is a correlation coefficient that has been modified to account for: Question 13 Tips for building useful models include: Question 14 The model residuals are examined to: Question 15 Results of regression analysis are often abused in the following ways: Question 16 The basic reason for randomness of sampling in design of experiments is: Question 17 In every experiment there is experimental error. Which of the following statements is true? Question 18 An aspect of good experimental strategy is to study the effects of the variables (Xs) over a wide range. This strategy increases the chances that effects will be found because: Question 19

This technique is used to eliminate the effects of nuisance factors (e.g., machines, day of week, and season of year) from an experiment. Question 20 A 32 experiment means that we are experimenting with: Question 21 We ran a taste-test to see which soft drink employees in our company prefer. We had 100 employees, selected as randomly as possible, taste test two brands and determine which they preferred. Which of the following would be a reasonable statistical analysis to determine if there is a clear preference among our employees? Question 22 We are testing the null hypothesis that the average monthly revenue between four insurance offices is the same. We obtained a pvalue of .07. Which of the following would be an appropriate conclusion about the population? Question 23 For which of the following scenarios am I most likely to utilize a Chi-squared test? Question 24 Which of the following could be considered a prediction interval? Question 25

I have made a mistake in copying data into my computer to perform a large regression model with 20 independent variables. Basically, I ended up with random data in each of the columns. However, I accidentally ran the regression anyway. Making reasonable assumptions, which of the following outcomes is most likely? MAT 510 Final Exam Set 2 •

Question 1

In every experiment there is experimental error. Which of the following statements is true? •

Question 2

This technique is used to eliminate the effects of nuisance factors (e.g., machines, day of week, and season of year) from an experiment. •

Question 3

An aspect of good experimental strategy is to study the effects of the variables (Xs) over a wide range. This strategy increases the chances that effects will be found because: •

Question 4 A 32 experiment means that we are experimenting with:

Question 5 Given the plot below, what might you suspect about factors A

and B?

Question 6

Which type of variation was critical to resolving the realized revenue case study? •

Question 7

Figure 2.15 displays a model of the statistics discipline, showing the relationship between statistical thinking, statistical engineering, and statistical methods and tools. Which of the following is a principle illustrated by this model? •

Question 8 The model residuals are examined to:

Question 9

A statistic that is used to indicate too much correlation between the predictors in a regression analysis is called the: •

Question 10 The best way to evaluate the validity of a statistical model is:

Question 11

George Box tells us “all models are wrong but some are useful”. By this comment he means: •

Question 12

Models based on subject matter fundamentals (theory) are generally better than statistical models for: •

Question 13

We are testing the null hypothesis that the average monthly revenue between four insurance offices is the same. We obtained a pvalue of .07. Which of the following would be an appropriate conclusion about the population? •

Question 14

I have calculated an interval to document the uncertainty in my estimate of the long-term standard deviation I will experience in time to pay invoices in my business going forward. Baaed on this information, this should be considered what type of interval? •

Question 15

After running an ANOVA comparing the average years of experience between five different job classifications, we obtained a p value of .02. Which of the following would be a reasonable conclusion concerning the population in this case? •

Question 16

For which of the following scenarios am I most likely to utilize a Chi-squared test? •

Question 17 Which of the following could be considered a prediction interval?

Question 18

Improvement is needed for an organization to survive because: •

Question 19

Control limits were originally defined at the three-sigma level because: •

Question 20

If my histogram appears bimodal, what tool might help me evaluate why? •

Question 21

In evaluating data on our process outputs, four characteristics we might investigate are: central tendency, variation, shape of distribution, and stability. Which of the following tools would be most helpful to determine stability of the process? •

Question 22 The histogram has which of the following limitations?

Question 23

Non-random and unpredictable patterns on a control chart indicate: •

Question 24

Refer to Figure 3.21 and choose the correct statement for the measurements •

Question 25

Processes are important because: MAT 510 Final Exam Set 3 •

Question 1

Lean manufacturing, Six Sigma, Total Quality Management are some of the new systems for managing and improving an organization. What is a common theme running through these approaches? •

Question 2

Figure 2.15 displays a model of the statistics discipline, showing the relationship between statistical thinking, statistical engineering, and statistical methods and tools. Which of the following is a principle illustrated by this model? •

Question 3 The Hidden Factory is:

Question 4 Sub-optimization occurs when:

Question 5

Suppose the Process Improvement Framework were used to attack a problem where the process in question was inherently unstable. Which of the following would be a likely result of this effort? •

Question 6

The histogram has which of the following limitations? •

Question 7

Control limits were originally defined at the three-sigma level because: •

Question 8

In evaluating data on our process outputs, four characteristics we might investigate are: central tendency, variation, shape of distribution, and stability. Which of the following tools would be most helpful to determine the shape of the distribution? •

Question 9

If my histogram appears bimodal, what tool might help me evaluate why? •

Question 10 A process is said to be capable if:

Question 11 Results of regression analysis are often abused in the following

ways: •

Question 12 The model residuals are examined to:

Question 13 The best way to evaluate the validity of a statistical model is:

Question 14 Process models are used to:

Question 15

An Adjusted R-square value is a correlation coefficient that has been modified to account for: •

Question 16

The basic reason for randomness of sampling in design of experiments is: •

Question 17

Identify the assumption that is NOT made when conducting an experiment: •

Question 18

In the experimental layout below, which are the most important factors? Factor A -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1

Factor B -1 150 -1 148 -1 156 -1 158 1 137 1 132 1 145

1

1

1

147

Factor C

Y

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MAT 510 Midterm Exam (3 Set, 100% Score)

For more classes visit www.snaptutorial.com MAT 510 Midterm Exam Set 1 MAT 510 MIDTERM First Attempt â&#x20AC;˘ Question 1 Improvement is needed for an organization to survive because: â&#x20AC;˘ Question 2 Why is it so difficult for a person or an organization to improve?

• Question 3 A SIPOC map is: • Question 4 Lean manufacturing, Six Sigma, Total Quality Management are some of the new systems for managing and improving an organization. What is a common theme running through these approaches? • Question 5 Problem solving activities typically include: • Question 6 The fact that processes tend to be dynamic, rather than static, is a key principle of statistical thinking. Which of the following is a natural consequence of this fact? • Question 7 The Statistical Thinking Strategy has significant commonality with the scientific method. Which of the following statistical thinking principles is NOT generally associated with the scientific method? • Question 8 Figure 2.16 shows a chart of the Dow Jones Industrial Average from 1990 through 2011. This plot reveals some obvious change points, such as the 2008 financial collapse, and some unexplainable short-term variation. Assuming that these are the only sources of variation in this plot, what source of variation is NOT visible in the plot? • Question 9

In Figure 2.11, Coach Hau presented data showing where goals were scored on crosses. This produced unexpected results, in terms of where the goals came from, and helped his team determine an effective strategy on free kicks. This is an example of what principle of statistical thinking? • Question 10 The Statistical Thinking Strategy illustrated in Figure 2.14 provides a graphic of the overall approach to driving improvement through statistical thinking. Which of the following is a key principle illustrated in this specific graph? • Question 11 In the soccer case study, Coach Hau developed a flowchart of the steps one goes through to properly “head” the ball, and then developed unique drills to develop the team’s skills in each of these steps. This approach is an example of what statistical thinking principle? • Question 12 A manufacturing process has been experiencing problems. The operators charting the process data have identified the cause to be due to an unanticipated change in incoming raw materials. This problem should be considered: • Question 13 Process measurements are: • Question 14 Process complexity is important because complex processes:

• Question 15 Service and non-manufacturing processes: • Question 16 The Hidden Factory is: • Question 17 The primary goal of process mapping is to: • Question 18 Service processes are different from manufacturing processes in that: • Question 19 Viewing a business as a system is important because: • Question 20 Use of subject matter knowledge is a key aspect of the Statistical Thinking Strategy discussed in Chapter 2. For which of the following case studies in Chapter 4 was this principle NOT clearly applied? • Question 21 Which of the following are valid statements about the DMAIC framework? • Question 22

We learned in Chapter 3 that the measurement process is always important and worthy of our attention. However, in Chapter 4 we found that measurement can be absolutely critical to solving the problem. For which of the case studies in Chapter 4 was measurement NOT discussed as a critical issue? • Question 23 Which of the following are accurate statements about the relationship between the Process Improvement Framework (PIF) and the Problem Solving Framework (PSF)? • Question 24 The frameworks discussed in Chapter 4 could be considered more specific examples of: • Question 25 If you are thinking creatively about how to take existing tools and link and sequence them to develop a novel approach to solve important problems, this would be an example of:

MAT 510 MIDTERM 2ND Attempt • Question 1 Understanding variation is important because variation: • Question 2 A SIPOC map is:

• Question 3 Improvement is needed for an organization to survive because: • Question 4 Why is it so difficult for a person or an organization to improve? • Question 5 W. E. Deming commented “You don’t have to make these changes, survival is not mandatory.” His message is: • Question 6 The fact that processes tend to be dynamic, rather than static, is a key principle of statistical thinking. Which of the following is a natural consequence of this fact? • Question 7 In the advertising case study, the unexpected “V” shaped pattern in the plot of advertising dollars versus sales indicated what? • Question 8 Box, Hunter, and Hunter are quoted in this chapter as stating: “Data have no meaning in themselves; they are meaningful only in relation to a conceptual model of the phenomenon studied.” This critical point is related to which of the following principles of statistical thinking? • Question 9

Analysts have noticed that October tends to be a bad month in the collections department – our collections on past due accounts tend to be consistently lower in October. This issue should be considered: • Question 10 It is, unfortunately, common in business for managers to demand an explanation for variation that is, based on statistics, typical and expected variation, i.e., common cause variation. Alternatively, there may be obvious special causes in the data that may be shrugged off as “typical business fluctuations”. Which of the following statements about interpretation of variation are true? • Question 11 The Statistical Thinking Strategy illustrated in Figure 2.14 provides a graphic of the overall approach to driving improvement through statistical thinking. Which of the following is a key principle illustrated in this specific graph? • Question 12 In Figure 2.11, Coach Hau presented data showing where goals were scored on crosses. This produced unexpected results, in terms of where the goals came from, and helped his team determine an effective strategy on free kicks. This is an example of what principle of statistical thinking? • Question 13 The Hidden Factory is: • Question 14 The primary goal of process mapping is to:

• Question 15 Viewing a business as a system is important because: • Question 16 The SIPOC model for a business helps everyone in the company see the business from an overall perspective by: I. Keeping a focus on customer needs II. Identifying inputs and outputs for each step of the process III. Displaying cross-function activities in simple terms IV. Helping maintain the big business picture • Question 17 Process complexity is important because complex processes: • Question 18 Service processes are different from manufacturing processes in that: • Question 19 Processes are important because: • Question 20 If you are thinking creatively about how to take existing tools and link and sequence them to develop a novel approach to solve important problems, this would be an example of: • Question 21

Which type of variation was critical to resolving the realized revenue case study? • Question 22 Suppose the Process Improvement Framework were used to attack a problem where the process in question was inherently unstable. Which of the following would be a likely result of this effort? • Question 23 The frameworks discussed in Chapter 4 could be considered more specific examples of: • Question 24 The Problem Solving Framework begins with a “Document the Problem” phase. The Process Improvement Framework does not begin this way, but rather begins with an “Understand the Process phase.” Which of the following are valid reasons for this difference? • Question 25 Which of the following are valid statements about the DMAIC framework? MAT 510 Midterm Exam Set 2 • Question 1 W. E. Deming commented “You don’t have to make these changes, survival is not mandatory.” His message is: • Question 2

The principal drivers of the rapid change in the global economy are: • Question 3 Process average or mean: • Question 4 Which of the following are principles of Statistical Thinking? • Question 5 A SIPOC map is: • Question 6 Figure 2.16 shows a chart of the Dow Jones Industrial Average from 1990 through 2011. This plot reveals some obvious change points, such as the 2008 financial collapse, and some unexplainable short-term variation. Assuming that these are the only sources of variation in this plot, what source of variation is NOT visible in the plot? • Question 7 Figure 2.15 displays a model of the statistics discipline, showing the relationship between statistical thinking, statistical engineering, and statistical methods and tools. Which of the following is a principle illustrated by this model? • Question 8 In the soccer case study, Coach Hau developed a flowchart of the steps one goes through to properly “head” the ball, and then developed unique drills to develop the team’s skills in each of these steps. This approach is an example of what statistical thinking principle?

• Question 9 Analysts have noticed that October tends to be a bad month in the collections department – our collections on past due accounts tend to be consistently lower in October. This issue should be considered: • Question 10 What is tool that can be used to detect the structure variation? • Question 11 In Figure 2.11, Coach Hau presented data showing where goals were scored on crosses. This produced unexpected results, in terms of where the goals came from, and helped his team determine an effective strategy on free kicks. This is an example of what principle of statistical thinking? • Question 12 The Statistical Thinking Strategy illustrated in Figure 2.14 provides a graphic of the overall approach to driving improvement through statistical thinking. Which of the following is a key principle illustrated in this specific graph? • Question 13 Viewing a business as a system is important because: • Question 14 Processes are important because: • Question 15

The Hidden Factory is: • Question 16 Refer to Figure 3.21 and choose the correct statement for the measurements • Question 17 Service processes are different from manufacturing processes in that: • Question 18 The SIPOC model for a business helps everyone in the company see the business from an overall perspective by: I. Keeping a focus on customer needs II. Identifying inputs and outputs for each step of the process III. Displaying cross-function activities in simple terms IV. Helping maintain the big business picture • Question 19 Sub-optimization occurs when: • Question 20 Which of the following are valid statements about the DMAIC framework? • Question 21 Suppose the Process Improvement Framework were used to attack a problem where the process in question was inherently unstable. Which of the following would be a likely result of this effort?

• Question 22 The Problem Solving Framework begins with a “Document the Problem” phase. The Process Improvement Framework does not begin this way, but rather begins with an “Understand the Process phase.” Which of the following are valid reasons for this difference? • Question 23 Which type of variation was critical to resolving the realized revenue case study? • Question 24 Which of the following are accurate statements about the relationship between the Process Improvement Framework (PIF) and the Problem Solving Framework (PSF)? • Question 25 If you are thinking creatively about how to take existing tools and link and sequence them to develop a novel approach to solve important problems, this would be an example of: MAT 510 Midterm Exam Set 3 Question 1 The standard deviation is: Question 2 Understanding variation is important because variation: Question 3

Process improvement activities typically include: Question 4 Process average or mean: Question 5 Which of the following are principles of Statistical Thinking? Question 6 In Figure 2.11, Coach Hau presented data showing where goals were scored on crosses. This produced unexpected results, in terms of where the goals came from, and helped his team determine an effective strategy on free kicks. This is an example of what principle of statistical thinking? Question 7 It is, unfortunately, common in business for managers to demand an explanation for variation that is, based on statistics, typical and expected variation, i.e., common cause variation. Alternatively, there may be obvious special causes in the data that may be shrugged off as â&#x20AC;&#x153;typical business fluctuationsâ&#x20AC;?. Which of the following statements about interpretation of variation are true? Question 8 The Statistical Thinking Strategy illustrated in Figure 2.14 provides a graphic of the overall approach to driving improvement through statistical thinking. Which of the following is a key principle illustrated in this specific graph? Question 9

In the soccer case study, Coach Hau developed a flowchart of the steps one goes through to properly â&#x20AC;&#x153;headâ&#x20AC;? the ball, and then developed unique drills to develop the teamâ&#x20AC;&#x2122;s skills in each of these steps. This approach is an example of what statistical thinking principle? Question 10 The Statistical Thinking Strategy has significant commonality with the scientific method. Which of the following statistical thinking principles is NOT generally associated with the scientific method? Question 11 Figure 2.15 displays a model of the statistics discipline, showing the relationship between statistical thinking, statistical engineering, and statistical methods and tools. Which of the following is a principle illustrated by this model? Question 12 A manufacturing process has been experiencing problems. The operators charting the process data have identified the cause to be due to an unanticipated change in incoming raw materials. This problem should be considered: Question 13 Process complexity is important because complex processes: Question 14 Service and non-manufacturing processes: Question 15

The Hidden Factory is: Question 16 The primary goal of process mapping is to: Question 17 The SIPOC model for a business helps everyone in the company see the business from an overall perspective by: I. Keeping a focus on customer needs II. Identifying inputs and outputs for each step of the process III. Displaying cross-function activities in simple terms IV. Helping maintain the big business picture Question 18 Refer to Figure 3.21 and choose the correct statement for the measurements Question 19 Processes are important because: Question 20 Which type of variation was critical to resolving the realized revenue case study? Question 21 Suppose a DMAIC Framework were used to attack a problem where the process in question was inherently stable. Which of the following would be a likely result of this effort?

Question 22 We learned in Chapter 3 that the measurement process is always important and worthy of our attention. However, in Chapter 4 we found that measurement can be absolutely critical to solving the problem. For which of the case studies in Chapter 4 was measurement NOT discussed as a critical issue? Question 23 Which of the following are accurate statements about the relationship between the Process Improvement Framework (PIF) and the Problem Solving Framework (PSF)? Question 24 The frameworks discussed in Chapter 4 could be considered more specific examples of: Question 25 If you are thinking creatively about how to take existing tools and link and sequence them to develop a novel approach to solve important problems, this would be an example of:

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MAT 510 Week 1 Homework Assignment 1

For more classes visit www.snaptutorial.com Homework Assignment 1 Due in Week 1 and worth 30 points Describe a work task, a hobby, or another activity that you regularly do, and sequentially list the various actions you take in order to complete this activity. Consider the complexity of your list and the amount of steps required to complete the activity. Answer the following questions in the space provided below: 1. 1. Differentiate the main actions between doing and improving your activities. 2. 2. Determine the overall manner in which variation has affected your activities.

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MAT 510 Week 2 Homework Assignment 2

For more classes visit www.snaptutorial.com Homework Assignment 2 Due in Week 2 and worth 30 points Answer the following questions in the space provided below: Explain the importance of variation to health-care organizations and answer the following questions. 1. a. What might be the key processes for health-care organizations? 2. b. key processes of health-care organizations What are the potential common causes of variation that would have an impact on the? 3. c. What special causes might be more important than the others? 4. d. How might health-care organizationsâ&#x20AC;&#x2122; business environment be dynamic and change over time?

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MAT 510 Week 3 Homework Assignment 3

For more classes visit www.snaptutorial.com Homework Assignment 3 Due in Week 3 and worth 30 points The following data consists of the actual time used and potential (the best time possible for this review process) to complete each step in the review process. The actual times are based on the review of 30 projects. The potential times are subjective engineering judgment estimates. Table: Basic Data Review for Construction Project Equipment Arrangement Cycle Time (hours) Step Description Actual Potential Difference 1 Read basic data package 4 4 â&#x20AC;&#x201D; 2 Write, type, proof, sign, copy, and distribute cover letter 21.9 0.5 21.4 3 Queue

40 0 40 4 Lead engineer calls key people to schedule meeting 4 0.25 3.75 5 Write, type, proof, sign, copy, and distribute confirmation letter 25.4 2.1 23.3 6 Hold meeting; develop path forward and concerns 4 4 — 7 Project leader and specialist develop missing information 12 12 — 8 Determine plant preferred vendors 12 12 — 9 Review notes from meeting 12 12 — 10 Resolve open issues

106 104 2 11 Write, type, proof, sign, copy, and distribute basic data acceptance letter 26.5 0.25 26.25 Totals 267.8 151.1 116.7 Use the data in the table above and answer the following questions in the space provided below: 1. 1. What are the sources of value-added and non-value-added work in this process? 2. 2. Where are the main opportunities to improve the cycle time of this process, with respect to both actual time used and the potential best times? What strategy would you use? 3. 3. Step 10: Resolve Open Issues required 104 hours (potential) versus 106 hours (actual). Is there an OFI here? Why or why not? If so, how would you attack it? 4. 4. What do you think are the most difficult critical issues to deal with when designing a sound cycle time study such as this one? Type your answers below and submit this file in Week 3 of the online course shell:

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MAT 510 Week 4 Case Study 1 Statistical Thinking in Health Care (2 Papers)

For more classes visit www.snaptutorial.com This Tutorial contains 2 Papers Case Study 1: Statistical Thinking in Health Care Due Week 4 and worth 150 points Read the following case study. Ben Davis had just completed an intensive course in Statistical Thinking for Business Improvement, which was offered to all employees of a large health maintenance organization. There was no time to celebrate, however, because he was already under a lot of pressure. Ben works as a pharmacist's assistant in the HMO's pharmacy, and his manager, Juan de Pacotilla, was about to be fired. Juan's dismissal appeared to be imminent due to numerous complaints and even a few lawsuits over inaccurate prescriptions. Juan now was asking Ben for his assistance in trying to resolve the problem, preferably yesterday! "Ben, I really need your help! If I can't show some major improvement or at least a solid plan by next month, I'm history."

"I'll be glad to help, Juan, but what can I do? I'm just a pharmacist's assistant." "I don't care what your job title is; I think you're just the person who can get this done. I realize I've been too far removed from day-to-day operations in the pharmacy, but you work there every day. You're in a much better position to find out how to fix the problem. Just tell me what to do, and I'll do it." "But what about the statistical consultant you hired to analyze the data on inaccurate prescriptions?" "Ben, to be honest, I'm really disappointed with that guy. He has spent two weeks trying to come up with a new modeling approach to predict weekly inaccurate prescriptions. I tried to explain to him that I don't want to predict the mistakes, I want to eliminate them! I don't think I got through, however, because he said we need a month of additional data to verify the model, and then he can apply a new method he just read about in a journal to identify 'change points in the time series,' whatever that means. But get this, he will only identify the change points and send me a list; he says it's my job to figure out what they mean and how to respond. I don't know much about statistics -- the only thing I remember from my course in college is that it was the worst course I ever took-but I'm becoming convinced that it actually doesn't have much to offer in solving real problems. You've just gone through this statistical thinking course, though, so maybe you can see something I can't. To me, statistical thinking sounds like an oxymoron. I realize it's a long shot, but I was hoping you could use this as the project you need to officially complete the course." "I see your point, Juan. I felt the same way, too. This course was interesting, though, because it didn't focus on crunching numbers. I have some ideas about how we can approach making improvements in prescription accuracy, and I think this would be a great project. We may not be able to solve it ourselves, however. As you know, there is a lot of finger-pointing going on; the pharmacists blame sloppy handwriting and incomplete instructions from doctors for the problem; doctors blame pharmacy assistants like me who actually do most of the computer entry

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MAT 510 Week 4 Homework Assignment 4

For more classes visit www.snaptutorial.com Homework Assignment 4 Due in Week 4 and worth 30 points Discuss one (1) project where you used a problem-solving approach to address what turned out to be common-cause variation, or where you used a process improvement approach to deal with a special cause. If you do not have a personal experience that echoes either of these situations, you may use Internet to search for a case that reflects either of these situations. Examples: · one’s personal investment strategy since 2008 · reducing waiting times at the local hospital or emergency room · reducing difficulties trying to connect to a Wi-Fi Internet provider Answer the following questions in the space provided below: 1. 1. Describe the experience in the project. 2. 2. What were the solutions used to address the problem? 3. 3. Was the case you described a special-cause or common-cause? 4. 4. Do you feel the solution or approach used appropriate for the cause? 5. 5. What would you do if you could do it again? 6. 6. What conclusions can you draw from the problem-solving or process-improvement techniques? Note: You may create and / or make all necessary assumptions needed for the completion of this assignment. In your original work, you may

use aspects of existing processes from either your current or a former place of employment. However, you must remove any and all identifying information that would enable someone to discern the organization(s) that you have used.

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MAT 510 Week 6 Homework Assignment 5

For more classes visit www.snaptutorial.com Homework Assignment 5 Due in Week 6 and worth 30 points The data in below table lists country code and the order to remittance (OTR) time for hardware / software installations for the last 76 installations (from first to last). OTR is the time it takes from an order being placed until the system is installed and we receive payment (remittance). Because this company does business internationally, it also

notes the country of installation using a country code. This code is listed in the first column. Use the date in table above and answer the following questions in the space provided below: 1. Does the OTR time appear to be stable? Why or why not? 2. If you were to use a control chart to evaluate stability, which chart would you use? Why? 3. What can you learn about the distribution of the installation process? 4. Does it appear that the country has an impact on installation time? Why or why not?

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MAT 510 Week 6 Homework Assignment 6

For more classes visit www.snaptutorial.com Due in Week 8 and worth 30 points The experiment data in below table was to evaluate the effects of three variables on invoice errors for a company. Invoice errors had been a

major contributor to lengthening the time that customers took to pay their invoices and increasing the accounts receivables for a major chemical company. It was conjectured that the errors might be due to the size of the customer (larger customers have more complex orders), the customer location (foreign orders are more complicated), and the type of product. A subset of the data is summarized in the following Table. Table: Invoice Experiment Error Customer Size Customer Location Product Type Number of Errors - 15 + 18 - + 6+ + 2+ 19 + + 23 - + + 16 + + + 21 Customer Size: Small (-), Large (+) Customer Location: Foreign (-), Domestic (+) Product Type: Commodity (-), Specialty (=) Reference: Moen, Nolan, and Provost (R. D. Moen, T. W. Nolan and L. P. Provost. Improving Quality through Planned Experimentation. New York: McGraw-Hill, 1991) Use the date in table above and answer the following questions in the space provided below: 1. 1. What was the average effect of the process change? Did the process average increase or decrease and by how much? 2. 2. Analyze the data using the regression model y = b0 + b1x, where y = time to approve and mail a claim (weekly average), x = 0 for the old process, and x = 1 for the new process. 3. 3. How does this model measure the effect of the process change? 4. 4. How much did the process performance change on the average? (Hint: Compare the values of b1 and the average of new process performance minus the average of the performance of the old process.)

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MAT 510 Week 7 Homework Assignment 6

For more classes visit www.snaptutorial.com Homework Assignment 6 Due in Week 7 and worth 30 points The data in the table below is from a study conducted by an insurance company to determine the effect of changing the process by which insurance claims are approved. The goal was to improve policyholder satisfaction by speeding up the process and eliminating some non-valueadded approval steps in the process. The response measured was the average time required to approve and mail all claims initiated in a week. The new procedure was tested for 12 weeks, and the results were compared to the process performance for the 12 weeks prior to instituting the change. Table: Insurance Claim Approval Times (days) Old Process New Process Week Elapsed Time

Week Elapsed Time 1 31.7 13 24 2 27 14 25.8 3 33.8 15 31 4 30 16 23.5 5 32.5 17 28.5 6 33.5 18 25.6 7

38.2 19 28.7 8 37.5 20 27.4 9 29 21 28.5 10 31.3 22 25.2 11 38.6 23 24.5 12 39.3 24 23.5 Use the date in table above and answer the following questions in the space provided below: 1. What was the average effect of the process change? Did the process average increase or decrease and by how much?

2. Analyze the data using the regression model y = b0 + b1x, where y = time to approve and mail a claim (weekly average), x = 0 for the old process, and x = 1 for the new process. 3. How does this model measure the effect of the process change? 4. How much did the process performance change on the average? (Hint: Compare the values of b1 and the average of new process performance minus the average of the performance of the old process.)

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MAT 510 Week 8 Case Study 2 Improving E-Mail Marketing Response (2 Papers)

For more classes visit www.snaptutorial.com This Tutorial contains 2 Papers Case Study 2: Improving E-Mail Marketing Response Due Week 8 and worth 160 points Read the following case study.

The specific course learning outcomes associated with this assignment are: 路 Build regression models for improving business processes. 路 Design experiments to test cause-and-effect relationships in business processes. 路 Use technology and information resources to research issues in business process improvement. 路 Write clearly and concisely about business process improvement using proper writing mechanics.

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MAT 510 Week 8 Homework Assignment 7

For more classes visit www.snaptutorial.com Homework Assignment 7 Due in Week 8 and worth 30 points

The experiment data in below table was to evaluate the effects of three variables on invoice errors for a company. Invoice errors had been a major contributor to lengthening the time that customers took to pay their invoices and increasing the accounts receivables for a major chemical company. It was conjectured that the errors might be due to the size of the customer (larger customers have more complex orders), the customer location (foreign orders are more complicated), and the type of product. A subset of the data is summarized in the following Table. Reference: Moen, Nolan, and Provost (R. D. Moen, T. W. Nolan and L. P. Provost. Improving Quality through Planned Experimentation. New York: McGraw-Hill, 1991) Use the date in table above and answer the following questions in the space provided below: 1. 1. What is the nature of the effects of the factors studied in this experiment? 2. What strategy would you use to reduce invoice errors, given the results of this experiment?

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MAT 510 Week 9 Homework Assignment 8

For more classes visit

www.snaptutorial.com Homework Assignment 8 Due in Week 9 and worth 30 points Suppose the number of equipment sales and service contracts that a store sold during the last six (6) months for treadmills and exercise bikes was as follows: Treadmill Exercise Bike Total sold 185 123 Service contracts 67 55 The store can only sell a service contract on a new piece of equipment. Of the 185 treadmills sold, 67 included a service contract and 118 did not. Complete the following questions in the space provided below: 1. 1. Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes. 2. Is there a major difference between the two pieces of equipment? Why or why not?

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MAT 510 Week 10 Homework Assignment 9

For more classes visit www.snaptutorial.com Homework Assignment 9 Due in week 10 and worth 30 points Suppose that there are two (2) candidates (i.e., Jones and Johns) in the upcoming presidential election. Sara notes that she has discussed the presidential election candidates with 15 friends, and 10 said that they are voting for candidate Jones. Sara is therefore convinced that candidate Jones will win the election because Jones gets more than 50% of votes. Answer the following questions in the space provided below: 1. 1. Based on what you now know about statistical inference, is Saraâ&#x20AC;&#x2122;s conclusion a logical conclusion? Why or why not? 2. 2. How many friend samples Sara should have in order to draw the conclusion with 95% confidence interval? Why? 3. 3. How would you explain your conclusion to Sara without using any statistical jargon? Why?

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MAT 510 Education Begins/snaptutorial.com

For more classes visit www.snaptutorial.com MAT 510 Final Exam Set 1 Question 1 Improvement is needed for an or...

MAT 510 Education Begins/snaptutorial.com

For more classes visit www.snaptutorial.com MAT 510 Final Exam Set 1 Question 1 Improvement is needed for an or...