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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