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Estimators Properties A researcher knows a random variable X has E[X] = and V[X] = o both finite. Here the researcher knowns

b) Is 72 an unbiased estimator for the population variance o2? Justify your answer.

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9) For consistency N Do ECO2) = E(h 2(n-1) = 20 b lim ha : Ő is consistent estimator for o2 By weat law of large number lim p

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