A manufacturer of industrial light bulbs likes its bulbs to have a mean length of life that
Question:
A sample of 20 bulbs tested produced the following lengths of life (in hours):
The manufacturer wishes to control the variability in length of life so that s is less than 150 hours. Do the data provide sufficient evidence to indicate that the manufacturer is achieving this goal? Test using α = .01.
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Related Book For
Introduction To Probability And Statistics
ISBN: 9781133103752
14th Edition
Authors: William Mendenhall, Robert Beaver, Barbara Beaver
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