Among All Unbiased Estimators That Are Weighted Averages of Y₁ $\bar { Y }$

question 7

Multiple Choice

Among all unbiased estimators that are weighted averages of Y₁,..., Y_n $\bar { Y }$ , is

• A)the only consistent estimator of µ_Y.
• B)the most efficient estimator of µ_Y.
• C)a number which, by definition, cannot have a variance.
• D)the most unbiased estimator of µ_Y.

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