12-15. In an industrial setting, process steam has been found to be normally distributed with an average

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12-15. In an industrial setting, process steam has been found to be normally distributed with an average value of 25,000 pounds per hour. There is an 80% probability that steam flow lies between 20,000 and 30,000 pounds per hour. What is the variance of the steam flow? (12.5)

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Engineering Economy

ISBN: 9781292265001

17th Global Edition

Authors: William G. Sullivan ,Elin M. Wicks ,C. Patrick Koelling

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