Question
Assume the mean useful life of a particular light bulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Calculate
Assume the mean useful life of a particular light bulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Calculate the useful life of light bulbs within two standard deviations of the mean.
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Managing Controlling and Improving Quality
Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund
1st edition
471697915, 978-0471697916
