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Assume T is the efficient estimator of unknown population mean (). Then which of the following statements is FALSE? a. E(T)= b. Variance of T

Assume T is the efficient estimator of unknown population mean (). Then which of the following statements is FALSE? a. E(T)= b. Variance of T is the smallest among the variances of all potential estimators of . c. Bias of the estimator T is zero. d. Bias of the estimator T is greater than zero.

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