Unbiased Estimator Definition
Which of the following statements accurately describes an unbiased estimator?
A
An estimator is unbiased when every single sample value equals the population parameter.
B
An estimator is unbiased if the mean of its sampling distribution is equal to the true population parameter.
C
An estimator is unbiased if it consistently overestimates the population parameter by a fixed amount.
D
An estimator is unbiased if its variance is zero.
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