a. 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 : µ1 – µ2 < 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 - statistically 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 : µ < 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? We - Select your answer - v that 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 : µ1 - 12 <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 - v statistically 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. The increase - Select your answer v statistically significant.
a. 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 : µ1 – µ2 < 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 - statistically 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 : µ < 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? We - Select your answer - v that 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 : µ1 - 12 <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 - v statistically 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. The increase - Select your answer v statistically significant.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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