The lifetime X (in hundreds of hours) of a certain type of
Chapter 5, Problem 72E(choose chapter or problem)
The lifetime ?X ?(in hundreds of hours) of a certain type of vacuum tube has a Weibull distribution with parameters ? and ? . Compute the following: a.?? ? ?X?) an? ?(?X?) b. P(X ? 6) c.P(1.5 ? X ? 6) (This Weibull distribution is suggested as a model for time in service in “On the Assessment of Equipment Reliability: Trading Data Collection Costs for Precision,” ?J. of Engr. Manuf., ?1991: 105–109.)
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