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Answered

Let X denote the lifetime of a machine component with an exponential distribution. The mean time for the component failure is 2500 hours.

Required:
What is the probability that the lifetime exceeds the mean time by more than 1 standard deviations?

Answer :

Answer:

15.8 % ???

at z = 1 p=.8413

I guess the question is asking 1-.8413 = 15.8 %

Step-by-step explanation:

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