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A random variable X is exponentially distributed with an expected value of 77 a-1. What is...

A random variable X is exponentially distributed with an expected value of 77

a-1. What is the rate parameter λ?

a-2. What is the standard deviation of X?

b. Compute P(68 ≤ X ≤ 86)

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(a). 1. Rate paramet   

2. The standard deviation of

(b).

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