8.3.37 Question Help A major airline recently began encouraging reservation agents to nap during their breaks. The table to the right lists the number of complaints received about each of a sample of8 reservation agents during the 6 months before naps were encouraged and during the 6 months after the policy change a. Do the data present sufficient evidence to conclude that the new napping policy reduced the mean number of customer complaints? Test using 0.01 b. What assumptions must hold to ensure the validity of the Operator Before After 15 10 10 Calculate the test statistic. t2.434 Round to three decimal places as needed.) Give the appropriate conclusion for the test. Do not reject Ho. Since the test statistic is not in the rejection region, there is insufficient evidence to conclude that the napping policy reduced the number of complaints b. Select all the conditions that are required for the test results to be valid A. The sample is random. B. The variances of the two populations are approximately the same C. D. E. The population of differences is approximately normal The populations being sampled are approximately normal No assumptions are required. 8.3.37 Question Help A major airline recently began encouraging reservation agents to nap during their breaks. The table to the right lists the number of complaints received about each of a sample of8 reservation agents during the 6 months before naps were encouraged and during the 6 months after the policy change a. Do the data present sufficient evidence to conclude that the new napping policy reduced the mean number of customer complaints? Test using 0.01 b. What assumptions must hold to ensure the validity of the Operator Before After 15 10 10 Calculate the test statistic. t2.434 Round to three decimal places as needed.) Give the appropriate conclusion for the test. Do not reject Ho. Since the test statistic is not in the rejection region, there is insufficient evidence to conclude that the napping policy reduced the number of complaints b. Select all the conditions that are required for the test results to be valid A. The sample is random. B. The variances of the two populations are approximately the same C. D. E. The population of differences is approximately normal The populations being sampled are approximately normal No assumptions are required