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Please answer parts a and b. Let Y1, Y2, . . . , YR be independent and identically distributed Poisson random variables with mean A

Please answer parts a and b.

Let Y1, Y2, . . . , YR be independent and identically distributed Poisson random variables with mean A > 0. (a) Find a sufficient statistic for A. (b) Find the ML estimator )l of A. (you do not need to check the second derivative!)

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