answer for letter d and e Will improving customer service result in higher stock prices for the companies providing the better service? "When a company's satisfaction score has improved over the prior year's results and is above the nationalaverage (75.7), studies show its shares have a good chance of outperforming the broad stock market in the long run." The following satisfaction scores of three companies for the fourth quarters of two previous yearswere obtained from the American Customer Satisfaction Index. Assume that the scores are based on a poll of 63 customers from each company. Because the polling has been done for several years, the standarddeviation can be assumed to equal 8 points in each case.ETTCompanyYear 1 ScoreYear 2 ScoreRite Aid7678Expedia7276J.C. Penney7782a. For Rite Aid, is the increase in the satisfaction score from Year 1 to Year 2 statistically significant? Use a 0.05 and null hypothesis is Ho : H1-H2

Question

answer for letter d and e Will improving customer service result in higher stock prices for the companies providing the better service? &#34;When a company's satisfaction score has improved over the prior year's results and is above the nationalaverage (75.7), studies show its shares have a good chance of outperforming the broad stock market in the long run.&#34; The following satisfaction scores of three companies for the fourth quarters of two previous yearswere obtained from the American Customer Satisfaction Index. Assume that the scores are based on a poll of 63 customers from each company. Because the polling has been done for several years, the standarddeviation can be assumed to equal 8 points in each case.ETTCompanyYear 1 ScoreYear 2 ScoreRite Aid7678Expedia7276J.C. Penney7782a. For Rite Aid, is the increase in the satisfaction score from Year 1 to Year 2 statistically significant? Use a 0.05 and null hypothesis is Ho : H1-H2 <0. Find the test statistic and p-value. Use Table 1 of Appendix B.z value(to 2 decimals)p-value(to 4 decimals)What can you conclude?The difference - Select your answer vstatistically significant.b. Can you conclude that the Year 2 score for Rite Aid is above the national average of 75.7? Use a = 0.05 and test the null hypothesis Ho : p< 75.7. Find the test statistic and p-value. Use Table 1 of Appendix B.z value(to 2 decimals)p-value(to 4 decimals)What can you conclude?WeSelect your answer - vthat customer service has improved for Rite Aid.c. For Expedia, is the increase from Year 1 to Year 2 statistically significant? Use a = 0.05 and test the null hypothesis Ho H1- Ha S0. Find the test statistic and p-value. Use Table 1 of Appendix B.z value(to 2 decimals)p-value(to 4 decimals)What can you conclude?The differenceSelect your answer - vstatistically significant.d. When conducting a hypothesis test with the values given for the standard deviation, sample size, and a, how large must the increase from Year 1 to Year 2 be for it to be statistically significant?(to 2 decimals)e. Use the result of part (d) to state whether the increase for J.C. Penney from year 1 to year 2 is statistically significant.a Pret vithCamScannerThe in reasct yr .W.stotist ca ly sic nifica

Accepted Answer

Given datacompany           year 1 score          year 2 score Rite Aid                  76…