A magazine uses a survey of readers to obtain customersatisfaction ratings for the nation's largest retailers. Eachsurvey respondent is asked to rate a specified retailer in terms ofsix factors: quality of products, selection, value, checkoutefficiency, service, and store layout. An overall satisfactionscore summarizes the rating for each respondent with 100 meaningthe respondent is completely satisfied in terms of all six factors.Sample data representative of independent samples of Retailer A andRetailer B customers are shown below.
| Retailer A | Retailer B |
|---|
n1 = 25 | n2 = 30 |
x1 = 79 | x2 = 71 |
Assume that experience with the satisfaction rating scale of themagazine indicates that a population standard deviation of 11 is areasonable assumption for both retailers. Conduct the hypothesistest.
Find the value of the test statistic. (Round your answer to twodecimal places.)
Find the p-value. (Round your answer to four decimalplaces.)
p-value =
Provide a 95% confidence interval for the difference between thepopulation mean customer satisfaction scores for the two retailers.(Round your answers to two decimal places.)
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