Business stats

A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 731 hours. A random sample of 24 light bulbs has a mean life of 705 hours. Assume the population is normally distributed and the population standard deviation is 55 hours. At a = 0.02, do you have enough evidence to reject the manufacturer's claim? Complete parts (a) through (e). (a) Identify the null hypothesis and alternative hypothesis. O A. Ho H>731 O B. Ho: H 2 731 (claim) O C. Ho HS 705 Ha us 731 (claim) Ha: H 705 (claim) O D. Ho: H # 731(claim) O E. Ho: H