A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 749 hours. A random sample of 28 light bulbs has a mean life of 720 hours. Assume the population is normally distributed and the population standarddeviation is 64 hours. At α = 0.08, do you have enough evidence to reject the manufacturer's claim? Complete parts (a) through (e).(a) Identify the null hypothesis and alternative hypothesis.A. Ho: μ> 749Ha: ≤749 (claim)D. Ho: μ≤ 720Ha: μ>720 (claim)B. Ho: μ = 720Ha: μ#720 (claim)E. Ho: μ#749(claim)Ha: μ = 749O C. Ho: μ<720 (claim)Ha:μ ≥720OF. Ho: μ ≥749 (claim)Ha: μ<749

From the provided information, Sample size (n) = 28 Sample mean (x̄) = 720 Population standard…

Answered: A light bulb manufacturer guarantees…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Let x be a random variable representing the starting salary of a first-year teacher in a city. A report claims that the mean starting salary of these first-year teachers is greater than $50,000. To test this claim we find that a random sample of 20 teachers has a mean starting salary of $51,425 with a sample standard deviation of $3,549. If you assume that the population mean is $50,000, find the P-value corresponding to the hypothesis that the mean starting salary of the first-year teachers is greater than $50,000.
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