A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 746 hours. A random sample of 28 light bulbs has a mean life of 719 hours. Assume the population is...

Extracted text: A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 746 hours. A random sample of 28 light bulbs has a mean life of 719 hours. Assume the population is normally distributed and the population standard deviation is 64 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= 719 O B. Ho: µ2746 (claim) Ha: µ<746 oc.="" ho:="" h="">746 H3: u#719 (claim) Ha: us746 (claim) O D. Ho: H<719 (claim)="" o="" e.="" ho:="" hs719="" of.="" ho:="" h#746(claim)="" h:u="746" hai="" h2719="" ha:="" u="">719 (claim) (b) Identify the critical value(s). Use technology. zo = (Use a comma to separate answers as needed. Round to two decimal places as needed.) Identify the rejection region(s). Choose the correct answer below. OA. O B. Oc. Fail to reject Ho Fail to reject H- Fail to reject H- Reject Ho/ Reject Ho- Reject Ho- Reject H. Click to select your answer(s). MacBook Air esc F4 F1 F3 @ 2# & 3 4 6 8