Please answer a through d

1 Of 3 (3 complete) HW Score: 76.19%, 2.29 of 3 pts x Instructor-created question Question Help The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,493 hours. The population standard deviation is 100 hours. A random sample of 64 light bulbs indicates a sample mean life of 7,468 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,493 hours? b. Compute the p-value and interpret its meaning. c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs. d. Compare the results of (a) and (c). What conclusions do you reach? a. Let u be the population mean. Determine the null hypothesis, Ho, and the alternative hypothesis, H, . Ho: H= 7493 H1: H# 7493 What is the test statistic? ZSTAT = (Round to two decimal places as needed.) What is/are the critical value(s)? Round to two decimal places as needed. Use a comma to separate answers as needed.) What is the final conclusion? A. Reject Ho. There is not sufficient evidence to prove that the mean life is different from 7,493 hours. Jan O B. Fail to reject Ho. There is sufficient evidence to prove that the mean life is different from 7,493 hours. X More Click to select your answer(s) and then click Check Answer. ? All parts showing Clear All Check Answer APR P 29 .... . .. MacBook Air DII DD