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 7,476 hours. The population standard deviation is 700 hours. A random sample of 49 light bulbs indicates a sample mean life of 7,326 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,476 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 rJizach? a. Let be the population mean. Determine the null hypothesis, H0, and the alternative hypothesis, H1. H0:=7476H1:=7476 What is the test statistic? ZSTAT= (Round to two decimal places as needed.)