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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
2 Dec 2021

Given information

Suppose that the length of long-distance phone calls, measured in minutes, is known to have an exponential distribution with the average length of a call equal to eight minutes.

 

Step-by-step explanation

Step 1.

As the information given in the problem suggests, the random variable has to follow the exponential distribution.

Therefore, the random variable is given by

.    

 

 

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