Answered: The manufacturer of a particular brand…

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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Transcribed Image Text:The manufacturer of a particular brand of tires claims they average at least 50,000 miles before needing to be replaced. From past studies of this tire, it is known that the life-span of these tires is normally distributed and that the population standard deviation is 8,000 miles. Research on 28 such tires resulted in the findings that the mean lifespan was 47000 miles. Using a significance level of 5%, does this mean that the tires average fewer than 50000 miles before needing to be replaced (and thus that the manufacturer's statement is wrong)? We should use a ? test. What are the correct hypotheses? Ho: Select an answer ? HA: Select an answer ? Based on the hypotheses, find the following: Test Statistic= p-value = The correct decision is to Select an answer The correct conclusion is: Select an answer

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