Let T and T, be two unbiased estimators for an unknown parameter 6. It is given that Var(T) = 1 and Var(T2) = 3. Furthermore, T, and T2 are independent. Next, consider the estimator T3 = aT¡+ (1- a)T, where a e [0,1]. For which value of a has T3 the smallest mean squared error (MSE)? O 025 O 0.50 O 0.75 /

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Let T and T, be two unbiased estimators for an unknown parameter 0. It is given
that Var(T) = 1 and Var(T2) = 3. Furthermore, T, and T2 are independent. Next,
consider the estimator T3 = aT¡ + (1 – a)T3, where a e [0, 1].
For which value of a has T3 the smallest mean squared error (MSE)?
0.25
0.50
0.75 V
1
Transcribed Image Text:Let T and T, be two unbiased estimators for an unknown parameter 0. It is given that Var(T) = 1 and Var(T2) = 3. Furthermore, T, and T2 are independent. Next, consider the estimator T3 = aT¡ + (1 – a)T3, where a e [0, 1]. For which value of a has T3 the smallest mean squared error (MSE)? 0.25 0.50 0.75 V 1
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