If the expected value of the sample statistic is equal to the population parameter being estimated, the sample statistic is said to
a. have low variability.
b. be an unbiased estimator of the population parameter.
c. have high precision.
d. be a random estimator of the population parameter.
b
RATIONALE: If the expected value of the sample statistic is equal to the population parameter being estimated, the sample statistic is said to be an unbiased estimator of the population parameter.
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