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iid 4. [3 points] Suppose X'- N 33X, 3' = 1, 2, . . . ,n. Calculate the expected value of the sample mean: 5n

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iid 4. [3 points] Suppose X'- N 33X, 3' = 1, 2, . . . ,n. Calculate the expected value of the sample mean: 5n = g 2 Xe. (4.2) "What is the variance of Sn? 'What happens to the variance of 8,1 as n > 00? What does this mean about the PMF of the sample mean

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