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2. Let Y , Y, ,...Y denote a random sample from Gamma distribution(a=2, (). a) Find a sufficient statistic for 0. (25 pts) b) Find

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2. Let Y , Y, ,...Y denote a random sample from Gamma distribution(a=2, (). a) Find a sufficient statistic for 0. (25 pts) b) Find the minimal sufficient statistic for O. c) Find the maximum likelihood estimator of 0. d) Find the method of moment estimator of 0. Find the minimum variance unbiased estimator of 0

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