A manufacturer wants to establish that the mean life of a gear when used in a crusher

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A manufacturer wants to establish that the mean life of a gear when used in a crusher is over 55 days. The data will consist of how long gears in 80 different crushers have lasted.

(a) Formulate the null and alternative hypotheses.

(b) If the true mean is 55 days, what error could be made? Explain your answer in the context of the problem.

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Probability And Statistics For Engineers

ISBN: 9780134435688

9th Global Edition

Authors: Richard Johnson, Irwin Miller, John Freund

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Question Posted: Apr 23, 2024 07:01 AM

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A manufacturer wants to establish that the mean life of a gear when used in a crusher

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SOLUTION a Null Hypothesis H0 The mean life of the gear is 55 days Alternative Hypothesis H1 The mea...View the full answer

Probability And Statistics For Engineers

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