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Mathematical Statistics with Applications | 7th Edition | ISBN: 9780495110811 | Authors: Dennis Wackerly; William Mendenhall; Richard L. Scheaffer
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Historical evidence indicates that times between fatal

Chapter 4, Problem 93E

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QUESTION:

Problem 93E

Historical evidence indicates that times between fatal accidents on scheduled American domestic passenger flights have an approximately exponential distribution. Assume that the mean time between accidents is 44 days.

a If one of the accidents occurred on July 1 of a randomly selected year in the study period, what is the probability that another accident occurred that same month?

b What is the variance of the times between accidents?

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QUESTION:

Problem 93E

Historical evidence indicates that times between fatal accidents on scheduled American domestic passenger flights have an approximately exponential distribution. Assume that the mean time between accidents is 44 days.

a If one of the accidents occurred on July 1 of a randomly selected year in the study period, what is the probability that another accident occurred that same month?

b What is the variance of the times between accidents?

ANSWER:

 

Step1 of 4: Goal

a

If one of the accidents occurred on July 1 of a randomly selected year, what is the probability that another accident occurred that same month?

b

What is the variance of the times between accidents?

 

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