1. Suppose that the lifetime in years, X, of a type of electrical switch follows the distribution f (x) = ;e for x > 0. What type of continuous distribution is this and what is the average lifetime of one of these switches? (You shouldn't need to do any calculus to answer this.)

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1. Suppose that the lifetime in years, X, of a type of electrical switch follows the distribution f (x) = ;e for x > 0.
What type of continuous distribution is this and what is the average lifetime of one of these switches? (You shouldn't
need to do any calculus to answer this.)
Transcribed Image Text:1. Suppose that the lifetime in years, X, of a type of electrical switch follows the distribution f (x) = ;e for x > 0. What type of continuous distribution is this and what is the average lifetime of one of these switches? (You shouldn't need to do any calculus to answer this.)
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