10.96 Prospective employees of an engineering firm are told that engineers in the firm work at least...

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10.96 Prospective employees of an engineering firm are told that engineers in the firm work at least 45 hours per week, on the average.

A random sample of 40 engineers in the firm showed that, for a particular week, they averaged 44 hours of work with a standard deviation of 3 hours. Are the prospective employees being told the truth?

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Probability And Statistics For Engineers

ISBN: 9781133006909

5th Edition

Authors: Richard L Scheaffer, Madhuri Mulekar, James T McClave, Cecie Starr

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