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Author Question: The time to failure t, in hours, of a certain machine can often be assumed to be exponentially ... (Read 71 times)

jman1234

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Question 1

The time of a telephone call (in minutes) to a certain town is a continuous random variable with a probability density function defined by  for Find the probability: 
◦ 0.000001
◦ 0.000316
◦ 0.000683
◦ 0.000074

Question 2

The time to failure t, in hours, of a certain machine can often be assumed to be exponentially distributed with probability density function f(t) = ke-kt, 0 ≤ t < ∞, where k =  and a is the average amount of time that will pass before a failure occurs. Suppose the average amount of time that will pass before a failure occurs is 87 hours. What is the probability that a failure will occur in 43 hours or less?
◦ 0.4680
◦ 0.3120
◦ 0.3900
◦ 0.2925


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Marked as best answer by jman1234 on Jun 16, 2021

lorealeza

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jman1234

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Reply 2 on: Jun 16, 2021
Excellent


sarah_brady415

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Reply 3 on: Yesterday
Gracias!

 

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