9.10 For a random sample of 50 measurements on the breaking strength of cotton threads, the mean...

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9.10 For a random sample of 50 measurements on the breaking strength of cotton threads, the mean breaking strength was found to be 210 grams and the standard deviation 18 grams.

Obtain a confidence interval for the true mean breaking strength of cotton threads of this type, with confidence coefficient 0.90.

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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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