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MTH 231 Entire Course

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MTH 231 Week 1 DQs MTH 231 Week 1 Populations and Sampling Paper MTH 231 Week 2 DQs MTH 231 Week 2 Data—Organizing, Summarizing, Probability, and Distribution Worksheet MTH 231 Week 3 DQs MTH 231 Week 3 Life Sciences Article Analysis MTH 231 Week 4 DQs MTH 231 Week 4 Confidence Intervals in the Life Sciences Presentation MTH 231 Week 4 Distribution, Hypothesis Testing, and Error Worksheet MTH 231 Week 5 Final Exam


MTH 231 Week 5 Hypothesis Testing and Correlation Worksheet

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MTH 231 Final Exam Guide Set 2

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Use the following table for questions 1 and 2.


Butterflies Red Blue Orange Yellow Collected in spring 3 2 1 24 Collected in summer 14 7 8 24 Collected in autumn 12 72 9 43


1. If you randomly select one butterfly from the table above, what is the probability of selecting a red butterfly or one collected in spring? 2. If you randomly select one butterfly collected in spring, one butterfly collected in summer, and one butterfly collected in autumn, what is the probability of selecting all yellow butterflies? 3. Determine the appropriate approach to conduct a hypothesis test for this claim: Fewer than 5% of patients experience negative treatment effects. Sample data: Of 500 randomly selected patients, 2.2% experience negative treatment effects. A) Use the normal distribution. B) Use the Student t distribution. C) Use the chi-square distribution. D) Use nonparametric or bootstrapping methods. 4. Determine the appropriate approach to conduct a hypothesis test for this claim: The systolic blood pressure of men who run at least five miles each week varies less than does the systolic blood pressure of all men. Sample data: n = 100 randomly selected men who run at least five miles each week, sample mean = 108.4, and s = 20.3 A) Use the normal distribution. B) Use the Student t distribution. C) Use the chi-square distribution. D) Use nonparametric or bootstrapping methods.

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MTH 231 Week 1 DQ 1 and DQ 2

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Week 1 DQ 1 Select the commodity of your best interest by ticking the box. You should get the data table thru clicking "retrieve" button at the end part of the list. ( You may use a commodity which is not explained in the class) Select the data among the month from 10 to 11 years as depicted below. Paste it to your clipboard using your mouse. Use only the numbers, not the month. Apply statdisk and paste it on statdisk. You are then required to select which column to be used. You have to choose column 1. Week 1 DQ 2 There are two broad areas of statistics: inferential and descriptive. In inferential statistics, we use analytical methods to derive meaning from our data. In descriptive statistics, we study effective ways to describe


the data. Charts and graphs are very important in descriptive statistics. Compare the graphs in Figures 2-6, 2-7, and 2-10 in the text. What does each graph communicate? How effective is each graph in communicating this information? How would you choose the kind of graph to use for a specific project? Give an example

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MTH 231 Week 1 Individual Assignment Populations and Sampling Paper

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Resources: Ch. 1 of the text, the Internet, and the University Library Consider how life sciences researchers collect information from samples to learn about populations. Write a 700- to 1,050-word paper about sampling from populations.


Include the following information: Define population and describe the characteristics of a population. Define sample and describe the characteristics of a sample. Compare samples and populations and explain how the concepts are related. Provide examples to illustrate your arguments. Explain how to increase the chance that a sample is representative of a chosen population. Provide an example. Describe random sampling and its benefits for research. Cite at least two references. Format your paper consistent with APA guidelines.

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MTH 231 Week 2 DQ 1 and DQ 2

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Week 2 DQ 1 Suppose a birdwatcher averages spotting 0.3 rare finches every day during the two hours allotted for watching. This means that the birdwatcher spots, on average, three rare finches every 10 days. The average is based on considerable experience. Over a given 10-day period, the birdwatcher sees zero rare finches in five days, and on the sixth day, the birdwatcher declares, “I’m due to see a rare finch today.” Assume that the environmental conditions are reasonably constant with no seasonal migratory issues involved. There is reasonably consistent weather and there are no confounding (lurking, unseen) variables involved. There is, however, a flaw in the birdwatcher’s statement. What is the error and why is it wrong? Would you choose the binomial pdf (probability distribution function) or would you choose the Poisson pdf to better analyze the birdwatcher's scenario (Triola, Sec. 4.3 & 4.4, 2006)? State the necessary criteria for each distribution and support your decision. Triola, M. M., Triola, M. D., &Triola, M. F. (2006). Biostatistics for the biological and health sciences. Retrieved from The University of Phoenix eBook Collection database. Week 2 DQ 2 Read the article What are Relative Risk, Number Needed to Treat and Odds Ratio? from the Electronic Reserve Readings on the Materials web page for Week 2. Summarize the measures of relative risk, number needed to treat, and odds ratios. In your opinion, which of these measures is most informative? Why are they frequently used together? Explain.


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MTH 231 Week 2 Individual Assignment Data-Organizing, Summarizing, Probability, and Distribution Worksheet

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Resources: Ch. 2–4 and Appendix B of the text and Statdisk Complete the University of Phoenix Material: Data—Organizing, Summarizing, Probability, and Distribution Worksheet located in Week Two of the student website (Materials web page).

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MTH 231 Week 3 DQ 1 and DQ 2

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Week 3 DQ 1 What are the characteristics of a normal probability distribution function (pdf). What is the standard normal pdf? How is it related to the normal pdf and why is it useful? Explain the Empirical Rule? Is it used for rough estimates or precise calculations? Briefly tell how to use Table A-2 in the Appendix of our text to calculate z-values (Triola, 2006). How is area under the standard normal curve related to probability? Is the table arranged so that probability is cumulative from the left or from the right? Briefly tell how Statdisk may be used to give even more accurate table values (Statdisk>> Analysis >> Probability Distributions >> Normal Distribution).


Week 3 DQ 2 Precisely, in simple language, what is a confidence interval? What is the difference between a statistic that is a point estimator and one that is an interval estimator? When might you prefer an interval estimator over a point estimator? What is a confidence level with respect to a confidence interval? What is a critical value and why is it important? What happens to the margin of error for a confidence interval when the sample size is increased? How is the margin of error related to the width of the confidence interval? State this relationship in mathematical terms. What happens to the width of the confidence interval if the confidence level is increased from 95% to 99%? That is, does the width increase or decrease? Why? What happens to the width of the confidence interval if n, the size of the sample, is increased? Why? For additional participation credit, also comment within the thread of the message posted in the Main Forum: Example: Using Statdisk to Find a Confidence Interval

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MTH 231 Week 3 Team Assignment Life Sciences Article Analysis


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Resources: Ch. 3 and 4 of the text, the Week Two Electronic Reserve Readings “Fetal Deaths and Proximity to Hazardous Waste Sites in Washington State” and “Intensive Lipid Lowering With Atorvastatin in Patients With Coronary Artery Disease, Diabetes, and Chronic Kidney Disease,” the Internet, and the University Library Discuss the methodology of life sciences researchers in the two articles. Explore the data collection and analysis techniques used by the authors of these articles in preparation for the Life Sciences Article Analysis. Write a 1,050- to 1,750-word paper about dependence and probability. Di

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MTH 231 Week 4 DQ 1 and DQ 2


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Week 4 DQ 1 State the criteria for choosing a t-test and a z-test. Then give an example of a problem in which you would use z-test to evaluate the data. Next, take the same example and modify it so that a t-test would be preferable. Explain why.

Week 4 DQ 2 In general terms: · What is a null hypothesis? · What is an alternative hypothesis? Under American criminal jurisprudence, the accused is presumed innocent until proven guilty beyond the “shadow of a doubt.” · What is the null hypothesis? · What is the alternative hypothesis?


· Explain how the Type I and Type II errors apply to the court system. · In court, what is the equivalent of the test statistic upon which the decision is based? · In statistical terms, how would you define “shadow of a doubt?” · In statistics, why should the decision always be stated in terms of the null hypothesis? (That is: reject the null hypothesis or fail to reject the null hypothesis.)

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MTH 231 Week 4 Individual Assignment Distribution, Hypothesis Testing, and Error Worksheet

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Resources: Ch. 5–7 of the text and Statdisk


Complete the University of Phoenix Material: Distribution, Hypothesis Testing, and Error Worksheet, located in Week Four of the student website.

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MTH 231 Week 4 Team Assignment Confidence Intervals in the Life Sciences Presentation

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Resources: Ch. 5 and 6 of the text, the University Library, the Internet, and Statdisk Identify a normally distributed variable related to your chosen life science that serves as your example variable. Review the data sets presented in Appendix B of the text and in Statdisk, selecting one that corresponds with your chosen life science. Choose a particular variable


you would like to explore and use Statdisk to determine if its distribution is approximately normal. Note. Data Set 5: Passive and Active Smoke in the text does not include normally distributed data and may not be used in this project. Prepare a 12- to 15-slide MicrosoftÂŽ PowerPointÂŽ presentation that explains confidence intervals in your chosen life science. Imagine that you are responsible for educating first-year college students who are majoring in your chosen life science. Explain to the students how and why confidence intervals relate to their field. Discuss the following questions: What is a normal distribution? Describe your example variable and explain why normally distributed data is important in your chosen life science. Show the distribution of your example variable in a Statdiskgenerated image and demonstrate how to calculate the probability of a range of values within this normal distribution. What is a standard normal distribution? How does it differ from other normal distributions? Convert the normally distributed example variable within your chosen life science to a standard normal distribution. Show this example in a Statdisk-generated image and demonstrate how to calculate the probability of a range of values within this standard normal distribution. What is a confidence interval? Outline how confidence intervals may be used in your chosen life science. Demonstrate how to define confidence intervals within the normal distribution example variable. What is a confidence level? Show how a confidence level relates to the confidence interval using the example variable. What is a critical value? Show how critical values relate to the confidence interval using the example variable.


What is a margin of error? Describe how a margin of error relates to confidence intervals and to your chosen life science. Provide an example related to your example variable. What is a point estimate? Explain how a point estimate found from a confidence interval would be applied in your chosen life science. Provide an example related to your example variable. What can a confidence interval tell researchers in your chosen life science about an estimate of population mean? Provide an example related to your example variable. What can a confidence interval tell researchers in your chosen life science about an estimate of population variance? Provide an example related to your example variable. Include a title slide and conclusion slide, and cite at least four references on a references slide. Present the information about confidence intervals and your chosen life science to the instructor and the class just as you would to firstyear college students who need this information. For Local Campus students, these are oral presentations accompanied by Microsoft速 PowerPoint速 presentations. For Online and Directed Study students, these are Microsoft速 PowerPoint速 presentations with notes. Discuss with your classmates and answer questions

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MTH 231 Week 5 Final Exam Guide Set 1

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MTH 231 Week 5 Final Exam

Use this worksheet for your answers. Your score, based on the points shown for this exam in the rubric, will be corrected to the basis points shown for the final exam in the syllabus. Submit to the Assignments Section by 11:59 pm of the last day of class. Late work will not be accepted.


1. The following are the scores obtained by 30 students in epidemiology test: 83

67

94

77

55

82

79

72

88

65

81

63

92

61

85

71

79

70

89

52

66

63

75

84

99

81

73

79

68

77

a) Apply the Statdisk and look for the user-defined relative frequency histogram having a class width of 10 from 50. The labels must be “on�. Copy the histogram in this sheet. b)

Look for the Normality Assessment using the Statdisk.

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MTH 231 Week 5 Team Assignment Hypothesis Testing and Correlation Worksheet

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Resources: Ch. 7 and 8 and sections 9-1 and 9-2 in Ch. 9 of the text Complete the University of Phoenix Material: Hypothesis Testing and Correlation Worksheet, located in Week Five of the student website.

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MTH 231 help Minds Online/newtonhelp.com  

For more course tutorials visit uophelp.com is now newtonhelp.com www.newtonhelp.com MTH 231 Week 1 DQs MTH 231 Week 1 Populations and Sam...

MTH 231 help Minds Online/newtonhelp.com  

For more course tutorials visit uophelp.com is now newtonhelp.com www.newtonhelp.com MTH 231 Week 1 DQs MTH 231 Week 1 Populations and Sam...

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