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2-find the test statistics 3- find p-value range 4- what is the appropriate conclusion for the test?

2-find the test statistics 3- find p-value range 4- what is the appropriate conclusion for the test?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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2-find the test statistics 3- find p-value range 4- what is the appropriate conclusion for the test?
An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distributed with a mean of 850 hours and a standard deviation of 40 hours. Test the hypothesis that μ = 850 hours against the alternative, μ # 850 hours, if a random sample of 25 bulbs has an average life of 842 hours. Use a P-value in your answer. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Find the test statistic. (Round to two decimal places as needed.)
Transcribed Image Text:An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distributed with a mean of 850 hours and a standard deviation of 40 hours. Test the hypothesis that μ = 850 hours against the alternative, μ # 850 hours, if a random sample of 25 bulbs has an average life of 842 hours. Use a P-value in your answer. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Find the test statistic. (Round to two decimal places as needed.)
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