为什么不选C呢

问题如下：

If an estimator is consistent, an increase in sample size will increase the:

选项：

A.

accuracy of estimates.

B.

efficiency of the estimator.

C.

unbiasedness of the estimator.

解释：

A is correct.

A consistent estimator is one for which the probability of estimates close to the value of the population parameter increases as sample size increases. More specifically, a consistent estimator’s sampling distribution becomes concentrated on the value of the parameter it is intended to estimate as the sample size approaches infinity

样本容量的增加，会增加总体参数估计的准确度。