A bolt manufacturer makes a type of bolt to be used in airtight containers. The manufacturer needs
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A bolt manufacturer makes a type of bolt to be used in airtight containers. The manufacturer needs to be sure that all of its bolts are very similar in width, so it sets an upper tolerance limit for the variance of bolt width at 0.01. A random sample of the widths of 28 bolts has a variance of 0.064. At a = 0.005, is there enough evidence to reject the manufacturer's claim?
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Kirti Kaushal
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Related Book For 
Elementary Statistics Picturing The World
ISBN: 9780321693624
5th Edition
Authors: Ron Larson, Betsy Farber
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