Among all unbiased estimators that are weighted averages of Y1,..., Yn , is
A) the only consistent estimator of µY.
B) the most efficient estimator of µY.
C) a number which, by definition, cannot have a variance.
D) the most unbiased estimator of µY.
Answer: B) the most efficient estimator of µY.
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What will be an ideal response?
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