$15.00
Add to Cart
Ashford BUS308 Week 2 Chapter 10 Assignment
Question 1 Exercise 10.07 (Inferences About the Difference Between TwoPopulation Means: Sigmas Known)Consumer Reports uses a survey of readers to obtain customer satisfactionratings for the nation's largest supermarkets (Consumer Reportswebsite). Each survey respondent is asked to rate a specified supermarket basedon a variety of factors such as quality of products, selection, value, checkoutefficiency, service, and store layout. An overall satisfaction score summarizesthe rating for each respondent with meaning the respondent is completelysatisfied in terms of all factors. Sample data representative of independent samplesof Publix and Trader Joe's customers are shown below.Excel File: data10-07.xlsx Publix Trader Joe's a. Formulate the null and alternative hypotheses to testwhether there is a difference between the population mean customer satisfactionscores for the two retailers. b. Assume that experience with the Consumer Reportssatisfaction rating scale indicates that a population standard deviation of isa reasonable assumption for both retailers. Conduct the hypothesis test andreport the -value.p-value = (todecimals) At a level of significance what isyour conclusion? Reject . There is not sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. Do not reject . There is not sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. Reject . There is sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. Do not reject . There is sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. c. Which retailer, if either, appears to have the greatercustomer satisfaction?Provide a confidence interval forthe difference between the population mean customer satisfaction scores for thetwo retailers. Enter negative values as negative numbers, if any. to(todecimals) Question 2 Exercise 10.17 (Inferences About the Difference Between TwoPopulation Means: Sigmas Unknown)Periodically, Merrill Lynchcustomers are asked to evaluate Merrill Lynch financial consultants andservices. Higher ratings on the client satisfaction survey indicate better servicewith the maximum service rating. Independent samples of service ratings for twofinancial consultants are summarized here. Consultant A has years ofexperience, whereas consultant B has year of experience. Use and test to seewhether the consultant with more experience has the higher population meanservice rating. Round degrees of freedom to previous whole number.Excel File: data10-17.xlsx Consultant A Consultant B a.State the null and alternative hypotheses.
:
: b.Compute the value of the test statistic. (to 2 decimals)
c.What is the p-value? Use Table 2 from Appendix B to find the values that bound the test statistic.
d.What is your conclusion?
Question 3 Exercise 10.27(Inferences About the Difference Between Two Population Means: Matched Samples)A personal fitness produces both adeluxe and a standard model of a smoothie blender for home use. Selling pricesobtained from a sample of retail outlets follow.Excel File: data10-27.xlsx Model Price ($) Model Price ($) Retail Outlet Deluxe Standard Retail Outlet Deluxe Standard 1 39 27 5 40 30 2 39 28 6 39 34 3 45 35 7 35 29 4 38 30 Roundyour answers to 2 decimal places.a. The manufacturer's suggested retail prices for the twomodels show a price differential. Use a level of significance and test that themean difference between the prices of the two models is .b. What is the confidence interval for the difference betweenthe mean prices of the two models? to
Question 4 Exercise 10.29 Algo (Inferences About the Difference Between TwoPopulation Proportions)Consider the hypothesis test below.The following results are forindependent samples taken from the two populations. Sample 1 Sample 2
Use pooled estimator of . a.What is the -value (to 4 decimals)? Use Table 1 from Appendix B.
b.With , what is your hypothesis testing conclusion?
Question 5 Exercise 10.41 (Inferences About the Difference Between Two PopulationMeans: Sigmas Unknown)The National Association of HomeBuilders provided data on the cost of the most popular home remodelingprojects. Sample data on cost in thousands of dollars for two types ofremodeling projects are as follows.Excel File: data10-41.xlsx Kitchen Master Bedroom Kitchen Master Bedroom 25.2 18.0 23.0 17.8 17.4 22.9 19.7 24.6 22.8 26.4 16.9 21.0 21.9 24.8 21.8 19.7 26.9 23.6 a.Develop a point estimate of the difference between the population meanremodeling costs for the two types of projects. Enter negative values asnegative numbers.
Point estimate
(Report in dollars with no commas in your answer.) b.Develop a confidence interval for the difference between the two populationmeans. (to 1 decimal and enter negative values as negative numbers)
( , )in thousands of dollars.
Question 6 Exercise 10.43 (Inferences About the Difference Between TwoPopulation Proportions)Country Financial, a financialservices company, uses surveys of adults age and older to determine whetherpersonal financial fitness is changing over time. A recent sample of adultsshowed indicating that their financial security was more than fair. Just a yearprior, a sample of adults showed indicating that their financial security wasmore than fair.a. State the hypotheses that can be used to test for asignificant difference between the population proportions for the two years.
b. Conduct the hypothesis test and compute the -value. Roundyour answer to four decimal places.
p-value = At level of significance, what isyour conclusion? Reject . There is not sufficient evidence to conclude that the population proportions are not equal. The data do not suggest that there has been a change in the population proportion saying that their financial security is more than fair. Reject . There is sufficient evidence to conclude that the population proportions are not equal. The data suggest that there has been a change in the population proportion saying that their financial security is more than fair. Do not reject . There is not sufficient evidence to conclude that the population proportions are not equal. The data do not suggest that there has been a change in the population proportion saying that their financial security is more than fair. Do not reject . There is sufficient evidence to conclude that the population proportions are not equal. The data suggest that there has been a change in the population proportion saying that their financial security is more than fair. c. What is the confidence interval estimate of the differencebetween the two population proportions? Round your answers to four decimalplaces.
Confidence Interval (to )
ANSWER WILL BE SENT BY EMAIL.
:
: b.Compute the value of the test statistic. (to 2 decimals)
c.What is the p-value? Use Table 2 from Appendix B to find the values that bound the test statistic.
d.What is your conclusion?
Question 3 Exercise 10.27(Inferences About the Difference Between Two Population Means: Matched Samples)A personal fitness produces both adeluxe and a standard model of a smoothie blender for home use. Selling pricesobtained from a sample of retail outlets follow.Excel File: data10-27.xlsx Model Price ($) Model Price ($) Retail Outlet Deluxe Standard Retail Outlet Deluxe Standard 1 39 27 5 40 30 2 39 28 6 39 34 3 45 35 7 35 29 4 38 30 Roundyour answers to 2 decimal places.a. The manufacturer's suggested retail prices for the twomodels show a price differential. Use a level of significance and test that themean difference between the prices of the two models is .b. What is the confidence interval for the difference betweenthe mean prices of the two models? to
Question 4 Exercise 10.29 Algo (Inferences About the Difference Between TwoPopulation Proportions)Consider the hypothesis test below.The following results are forindependent samples taken from the two populations. Sample 1 Sample 2
Use pooled estimator of . a.What is the -value (to 4 decimals)? Use Table 1 from Appendix B.
b.With , what is your hypothesis testing conclusion?
Question 5 Exercise 10.41 (Inferences About the Difference Between Two PopulationMeans: Sigmas Unknown)The National Association of HomeBuilders provided data on the cost of the most popular home remodelingprojects. Sample data on cost in thousands of dollars for two types ofremodeling projects are as follows.Excel File: data10-41.xlsx Kitchen Master Bedroom Kitchen Master Bedroom 25.2 18.0 23.0 17.8 17.4 22.9 19.7 24.6 22.8 26.4 16.9 21.0 21.9 24.8 21.8 19.7 26.9 23.6 a.Develop a point estimate of the difference between the population meanremodeling costs for the two types of projects. Enter negative values asnegative numbers.
Point estimate
(Report in dollars with no commas in your answer.) b.Develop a confidence interval for the difference between the two populationmeans. (to 1 decimal and enter negative values as negative numbers)
( , )in thousands of dollars.
Question 6 Exercise 10.43 (Inferences About the Difference Between TwoPopulation Proportions)Country Financial, a financialservices company, uses surveys of adults age and older to determine whetherpersonal financial fitness is changing over time. A recent sample of adultsshowed indicating that their financial security was more than fair. Just a yearprior, a sample of adults showed indicating that their financial security wasmore than fair.a. State the hypotheses that can be used to test for asignificant difference between the population proportions for the two years.
b. Conduct the hypothesis test and compute the -value. Roundyour answer to four decimal places.
p-value = At level of significance, what isyour conclusion? Reject . There is not sufficient evidence to conclude that the population proportions are not equal. The data do not suggest that there has been a change in the population proportion saying that their financial security is more than fair. Reject . There is sufficient evidence to conclude that the population proportions are not equal. The data suggest that there has been a change in the population proportion saying that their financial security is more than fair. Do not reject . There is not sufficient evidence to conclude that the population proportions are not equal. The data do not suggest that there has been a change in the population proportion saying that their financial security is more than fair. Do not reject . There is sufficient evidence to conclude that the population proportions are not equal. The data suggest that there has been a change in the population proportion saying that their financial security is more than fair. c. What is the confidence interval estimate of the differencebetween the two population proportions? Round your answers to four decimalplaces.
Confidence Interval (to )
ANSWER WILL BE SENT BY EMAIL.
