What are the values of alpha and beta

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Suppose the time spent by a randomly selected student who uses a terminal connected to a local time-sharing mini-frame computer facility has a gamma distribution with mean = 20 minutes and variance = 80 minutes.

a. What are the values of alpha and beta
b. What is the probability that a student uses the trminal for at most 24 minutes?
c. What is the probability that a student spends between 20 and 40 minutes using the terminal.

Reference no: EM13149301

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