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A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 761 hours. A random
Posted: Wed May 11, 2022 7:51 pm
by answerhappygod
- A Light Bulb Manufacturer Guarantees That The Mean Life Of A Certain Type Of Light Bulb Is At Least 761 Hours A Random 1 (192.61 KiB) Viewed 24 times
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 761 hours. A random sample of 20 light bulbs has a mean life of 739 hours. Assume the population is normally distributed and the population standard deviation is 61 hours. At a=0.08, do you have enough evidence to reject the manufacturer's claim? Complete parts (a) through (e) Ha H > 739 (claim) O D. Ho u* 761(claim) Ha = 761 Ha: 12739 O E. Ho u> 761 H, u 5761 (claim) H: 739 (claim) OF. Ho 412761 (claim) Ha <761 (b) Identify the critical value(s). Use technology (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. A. @B ay Fail to reject Ho Fail to reject Ho Fail to reject Ho Reject Ho oo 5 Reject H. Reject Ho ni Reject Ho A Next