Consumer Reports uses a survey of readers to obtain customer satisfaction ratings for the nation's largest supermarkets (Consumer Reports website). Each survey respondent is asked to rate a specified supermarket based on a variety of factors such as quality of products, selection, value, checkout efficiency, service, and store layout. An overall satisfaction score summarizes the rating for each respondent with 100 meaning the respondent is completely satisfied in terms of all factors. Sample data representative of independent samples of Publix and Trader Joe's customers are shown below. Excel File: data10-07.xlsx Publix n₁ = 250 T1 = 86 a. Formulate the null and alternative hypotheses to test whether there is a difference between the population mean customer satisfaction scores for the two retailers. Ho: 1-2 - Select your answer - H₂:1-12 Select your answer - + b. Assume that experience with the Consumer Reports satisfaction rating scale indicates that a population standard deviation of 12 is a reasonable assumption for both retailers. Conduct the hypothesis test and report the p-value. (to 3 decimals) + Trader Joe's n₂ = 300 T2 = 85 p-value = At a 0.05 level of significance what is your conclusion? I. Reject Ho. There is not sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. I. Do not reject Ho. There is not sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. I. Reject Ho. There is sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. V. Do not reject Ho. There is sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. - Select your answer - to c. Which retailer, if either, appears to have the greater customer satisfaction? - Select your answer - Provide a 95% confidence interval for the difference between the population mean customer satisfaction scores for the two retailers. Enter negative values as negative numbers, if any. (to 2 decimals)

Consumer Reports uses a survey of readers to obtain customer satisfaction ratings for the nation's largest supermarkets (Consumer Reports website). Each survey respondent is asked to rate a specified supermarket based on a variety of factors such as quality of products, selection, value, checkout efficiency, service, and store layout. An overall satisfaction score summarizes the rating for each respondent with 100 meaning the respondent is completely satisfied in terms of all factors. Sample data representative of independent samples of Publix and Trader Joe's customers are shown below. Excel File: data10-07.xlsx Publix n₁ = 250 T1 = 86 a. Formulate the null and alternative hypotheses to test whether there is a difference between the population mean customer satisfaction scores for the two retailers. Ho: 1-2 - Select your answer - H₂:1-12 Select your answer - + b. Assume that experience with the Consumer Reports satisfaction rating scale indicates that a population standard deviation of 12 is a reasonable assumption for both retailers. Conduct the hypothesis test and report the p-value. (to 3 decimals) + Trader Joe's n₂ = 300 T2 = 85 p-value = At a 0.05 level of significance what is your conclusion? I. Reject Ho. There is not sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. I. Do not reject Ho. There is not sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. I. Reject Ho. There is sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. V. Do not reject Ho. There is sufficient evidence to conclude that the mean satisfaction scores differ for the two retailers. - Select your answer - to c. Which retailer, if either, appears to have the greater customer satisfaction? - Select your answer - Provide a 95% confidence interval for the difference between the population mean customer satisfaction scores for the two retailers. Enter negative values as negative numbers, if any. (to 2 decimals)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 6PPS

See similar textbooks