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The lifetime X (in hundreds of hours) of a certain type of vacuum tube has a...

The lifetime X (in hundreds of hours) of a certain type of vacuum tube has a Weibull distribution with parameters α = 2 and β = 3.† Compute the following. (Round your answers to three decimal places.)

(a)    

E(X) and V(X)

E(X) =   
V(X) =


(b)    

P(X ≤ 5)




(c)    

P(1 ≤ X ≤ 5)

Math   Statistics-And-Probability   
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