Question: question is attached The qualityiwntml manager at a compact uorescent light bulb (CFL) tadory needs to determine whether the mean life at a large shipment

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The qualityiwntml manager at a compact uorescent light bulb (CFL) tadory needs to determine whether the mean life at a large shipment of CFLs is equal to 7,496 hours The population standard deviation is 840 hours. A random sample of 49 light bulbs indicates a sample mean life of 7,316 hours. a. At the 0.05 level of signicance, is there evidence that the mean like is different from 7,496 hours? b. Compute the p-value and interpret its meaning. c. Construct a 95% condence interval estimate of the population mean We of the light bulbs. d. Compare the results of (a) and (c). What conclusions do you reach? a. Let p be the population mean. Determine the null hypothesis H\". and the alternative hypothesis. H1 HD:|.I= Hl.p#

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