ponential distribution applies with B= 125. What are the mean and variance of the time that elaps lures occur? e mean is hours. ype an integer or a decimal. Do not round.)

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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A certain type of device has an advertised failure rate of 0.008 per hour. The failure rate is constant and the
exponential distribution applies with B=125. What are the mean and variance of the time that elapses before 2
failures occur?
The mean is hours.
(Type an integer or a decimal. Do not round.)
Transcribed Image Text:A certain type of device has an advertised failure rate of 0.008 per hour. The failure rate is constant and the exponential distribution applies with B=125. What are the mean and variance of the time that elapses before 2 failures occur? The mean is hours. (Type an integer or a decimal. Do not round.)
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