The operator of a pumping station has observed that demand for water during early evening ours has an approximately exponential distribution with mean 100 cfs (cubic feet per second). The probability that the demand will exceed 200 cfs during the early evening on a randomly selected day is 12.5%. Define the random variable and determine the standard deviation.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The operator of a pumping station has observed that demand for water during early evening
hours has an approximately exponential distribution with mean 100 cfs (cubic feet per second).
The probability that the demand will exceed 200 cfs during the early evening on a randomly
selected day is 12.5%. Define the random variable and determine the standard deviation.
Transcribed Image Text:The operator of a pumping station has observed that demand for water during early evening hours has an approximately exponential distribution with mean 100 cfs (cubic feet per second). The probability that the demand will exceed 200 cfs during the early evening on a randomly selected day is 12.5%. Define the random variable and determine the standard deviation.
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