The tensile strength of a metal part is normally distributed with mean 40 lb and standard deviation

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The tensile strength of a metal part is normally distributed with mean 40 lb and standard deviation 5 lb. If 50,000 parts are produced, how many would you expect to fail to meet a minimum specification limit of 35 lb tensile strength? How many would have a tensile strength in excess of 48 lb?
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Managing Controlling and Improving Quality

ISBN: 978-0471697916

1st edition

Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund

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