Question: Let X, X2,..., Xn be a random sample from a distribution having finite variance o. Show that S = (X-X is an unbiased estimator

Let X, X2,..., Xn be a random sample from a distribution having finite variance o. Show that S = (X-X is an unbiased estimator of i=1 n-1 Hint: Write S = n-1 (X n.X) and compute E(S). i=1 i

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