Suppose that 100 tires made by a certain manufacturer lasted on average 54,500 miles with a standard deviation of 2,000 miles. Do you have enough evidence to reject the manufacturer's claim that the average life is at least 55,000 miles? Test the claim at significance level a = = 0.05. State clearly what are your null and alternative hypotheses, show your work, and state your conclusion.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Suppose that 100 tires made by a certain manufacturer lasted on average 54,500
miles with a standard deviation of 2,000 miles. Do you have enough evidence to
reject the manufacturer's claim that the average life is at least 55,000 miles? Test the
claim at significance level a = 0.05. State clearly what are your null and alternative
hypotheses, show your work, and state your conclusion.
Transcribed Image Text:Suppose that 100 tires made by a certain manufacturer lasted on average 54,500 miles with a standard deviation of 2,000 miles. Do you have enough evidence to reject the manufacturer's claim that the average life is at least 55,000 miles? Test the claim at significance level a = 0.05. State clearly what are your null and alternative hypotheses, show your work, and state your conclusion.
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