To estimate a constant voltage , an engineer collects IID measurements , each with Two estimators are proposed: Which comparison is correct?

Question

To estimate a constant voltage   , an engineer collects IID measurements   , each with    Two estimators are proposed:    Which comparison is correct?

Accepted Answer

Both are unbiased, but    has smaller standard error when   .

Answer

Both have the same sampling distribution because they estimate the same parameter.

Answer

is more precise because it does not combine measurement errors.

Answer

Only    is unbiased.

Answer

is biased because the same data are used to estimate    and reduce uncertainty.

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To estimate a constant voltage , an engineer collects IID measurements , eac...

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