Question 7 Consumer report uses a survey of readers to obtain customer satisfaction ratings for the nation's largest retailers. Each survey respondent is asked to rate a specified retailer in terms of six factor: quality of products, selection, value, check out efficiency, service and store layout . Any overall satisfaction score summarizes the rating for each respondent with 100 meaning the respondent is completely satisfied in terms of all six factors. Sample data respresentative of independeent samples of Target and Walmart customers are show below. Target Walmart n - 25 n = 30 mean = 79 mean = 71 part a Formulate the null and alternative hypoteses to test whether there is a difference between the population mean customer satisfactions scores for the two retailers part b Assume that experience with the Consumer Reports satisfaction rating scale indicates that a sample standard deviation of 12 is a reasonable assumption for both retailers. Conduct hypothesis test and report the p-values. At a 0.05 level of significance what is your conclusion? part c Which retailer, if either, appears to have the greater customer satisfaction? Provide a 95% confidence interval for the difference between the population mean customer satisfaction scores for the two retailers.

Question 7...

Question 7

Consumer report uses a survey of readers to obtain customer satisfaction ratings for the nation's largest retailers. Each survey respondent is asked to rate a specified retailer in terms of six factor: quality of products, selection, value, check out efficiency, service and store layout . Any overall satisfaction score summarizes the rating for each respondent with 100 meaning the respondent is completely satisfied in terms of all six factors. Sample data respresentative of independeent samples of Target and Walmart customers are show below.


Target	Walmart
n - 25	n = 30
mean = 79	mean = 71

part a
Formulate the null and alternative hypoteses to test whether there is a difference between the population mean customer satisfactions scores for the two retailers


part b
Assume that experience with the Consumer Reports satisfaction rating scale indicates that a sample standard deviation of 12 is a reasonable assumption for both retailers. Conduct hypothesis test and report the p-values. At a 0.05 level of significance what is your conclusion?




part c
Which retailer, if either, appears to have the greater customer satisfaction? Provide a 95% confidence interval for the difference between the population mean customer satisfaction scores for the two retailers.

Jun 03, 2022