QNT 561 Weekly Learning Assessments Studentehelp is online education portal which provide you University of Phoenix course so that you can easily pass your exam regarding QNT 561 Weekly Learning Assessments, UOP QNT 561 Weekly Learning Assessments. QNT 561 Week 2 Weekly Learning Assessments Chapter 5 Exercise 4 A large company must hire a new president. The Board of Directors prepares a list of five candidates, all of whom are equally qualified. Two of these candidates are members of a minority group. To avoid bias in the selection of the candidate, the company decides to select the president by lottery. a. What is the probability one of the minority candidates is hired? (Round your answer to 1 decimal place.) b. Which concept of probability did you use to make this estimate?
Chapter 5 Exercise 14 The chair of the board of directors says, "There is a 50% chance this company will earn a profit, a 30% chance it will break even, and a 20% chance it will lose money next quarter." a. Use an addition rule to find the probability the company will not lose money next quarter. (Round your answer to 2 decimal places.) b. Use the complement rule to find the probability it will not lose money next quarter. (Round your answer to 2 decimal places.)
Chapter 5 Exercise 22 A National Park Service survey of visitors to the Rocky Mountain region revealed that 50% visit Yellowstone Park, 40% visit the Tetons, and 35% visit both. a. What is the probability a vacationer will visit at least one of these attractions? (Round your answer to 2 decimal places.) b. What is the probability .35 called? c. Are the events mutually exclusive?
Chapter 5 Exercise 34 P(A1) = .20, P(A2) = .40, and P(A3) = .40. P(B1|A1) = .25. P(B1|A2) = .05, and P(B1|A3) = . 10. Use Bayes' theorem to determine P(A3|B1). (Round your answer to 4 decimal places.)
Chapter 5 Exercise 40 Solve the following: a. 20!
b. 9P3
17!
c. 7C2
Chapter 6 Exercise 4 Which of these variables are discrete and which are continuous random variables? a. The number of new accounts established by a salesperson in a year. b. The time between customer arrivals to a bank ATM. c. The number of customers in Big Nick’s barber shop. d. The amount of fuel in your car’s gas tank. e. The number of minorities on a jury. f. The outside temperature today.
QNT 561 Week 3 Weekly Learning Assessments Chapter 8 Exercise 12 Scrapper Elevator Caompany has 20 sales representatives who sell its product throughout the United States and Canada. The number of units sold last month by each representative is listed below. Assume these sales figures to be the population values. 2
3
2
3
3
4
2
4
3
2
2
7
3
4
5
3
3
3
3
5
Click here for the Excel Data File b. Compute the mean of the population. (Round your answer to 1 decimal place.)
Chapter 8 Exercise 16 A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is: (Round z values to 2 decimal places and final answers to 4 decimal places): a. Less than 74.
b. Between 74 and 76. c. Between 76 and 77. d. Greater than 77.
Chapter 9 Exercise 4 Suppose you know Ďƒ and you want an 85% confidence level. What value would you use as z in formula of confidence interval for a population mean? (Round your answer to 2 decimal places.)
Chapter 9 Exercise 6 A research firm conducted a survey to determine the mean amount steady smokers spend on cigarettes during a week. They found the distribution of amounts spent per week followed the normal distribution with a population standard deviation of $5. A sample of 64 steady smokers revealed that . . a. What is the 95% confidence interval estimate of places.)
? (Round your answers to 3 decimal
Chapter 9 Exercise 10 Use Appendix B.5 to locate the value of t under the following conditions. (Round your answers to 3 decimal places.) a. The sample size is 15 and the level of confidence is 95%. b. The sample size is 24 and the level of confidence is 98%. c. The sample size is 12 and the level of confidence is 90%.
QNT 561 Week 4 Weekly Learning Assessments Chapter 10 Exercise 2 [The following information applies to the questions displayed below.]
A sample of 36 observations is selected from a normal population. The sample mean Conduct the following test of hypothesis using the 0.01 significance level H0: μ ≤ 10 H1: μ > 10 1. Award: 10 out of 10.00 points a. Is this a one- or two-tailed test?
b. What is the decision rule? c. What is the value of the test statistic? d. What is your decision regarding H0?
e. What is the p-value?
Chapter 10 Exercise 10 Given the following hypotheses: H0 : μ = 400 H1 : μ ≠ 400 A random sample of 12 observations is selected from a normal population. The sample mean was 407 and the sample standard deviation 6. Using the .01 significance level: a. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places.) b. Compute the value of the test statistic. (Round your answer to 3 decimal places.) c. What is your decision regarding the null hypothesis?
QNT 561 Week 5 Weekly Learning Assessments Chapter 13 Exercise 6 The owner of Maumee Ford-Mercury-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year.
a. If we want to estimate selling price on the basis of the age of the car, which variable is the dependent variable and which is the independent variable? b-1. Determine the correlation coefficient. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) b-2. Determine the coefficient of determination. (Round your answer to 3 decimal places.) c. Interpret the correlation coefficient. Does it surprise you that the correlation coefficient is negative? (Round your answer to nearest whole number.)
Chapter 13 Exercise 12 The Student Government Association at Middle Carolina University wanted to demonstrate the relationship between the number of beers a student drinks and his or her blood alcohol content (BAC). A random sample of 18 students participated in a study in which each participating student was randomly assigned a number of 12-ounce cans of beer to drink. Thirty minutes after they consumed their assigned number of beers, a member of the local sheriff’s office measured their blood alcohol content. The sample information is reported below.
QNT 561 Week 6 Weekly Learning Assessments Chapter 18 Exercise 2 Listed below is the number of movie tickets sold at the Library Cinema-Complex, in thousands, for the period from 2001 to 2013. Compute a five-year weighted moving average using weights
of 0.15, 0.1, 0.2, 0.17, and 0.38, respectively. Describe the trend in yield. (Round your answers to 3 decimal places.) 2001
8.41
2002
8.14
2003
7.77
2004
6.59
2005
7.17
2006
6.78
2007
6.81
2008
6.51
2009
5.78
2010
5.57
2011
5.84
2012
5.59
2013
5.53
Chapter 18 Exercise 10 Appliance Center sells a variety of electronic equipment and home appliances. For the last 4 years, 2010 through 2013, the following quarterly sales (in $ millions) were reported.
Year
I
II
III
IV
2010
5.3
4.1
6.8
6.7
2011
4.8
3.8
5.6
6.8
2012
4.3
3.8
5.7
6
2013
5.6
4.6
6.4
5.9
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