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please help in this 9. Let X1, . . . , Xn be independent exponential random variables with parameter A > O. The sample mean

please help in this
9. Let X1, . . . , Xn be independent exponential random variables with parameter A > O. The sample mean is f = % 3:1 Xi. Find the distribution of 7. Show your work. Identify the distribution by name; it is on the formula sheet. What are the parameters? Note that this question is asking for the exact distribution of X. It is not a Central Limit Theorem

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