Question: Let X1, X2, . . . , Xn be a random sample from a distribution having unknown mean . Then are both unbiased estimators of

Let X1, X2, . . . , Xn be a random sample from a distribution having unknown mean θ. Then

di (X1, X2, Xn) = X and +Xn d2(X1, X2, X): =

are both unbiased estimators of θ since

n

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di (X1, X2, Xn) = X and +Xn d2(X1, X2, X): = n

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