Question: Let XXX denote a random sample from a population having mean and variance o. Consider the following estimators of: 2 (a) is either estimator unbiased?

Let XXX denote a random sample from a population having mean and variance o. Consider the following estimators of: 2

(a) is either estimator unbiased?

(b) Which estimator is best? In what sense is it best? Calculate the relative efficiency of the two estimators.

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