题目
An estimator with an expected value equal to the parameter that it is intended to estimate is described as:
选项
A.efficient.
B.unbiased.
C.consistent.
答案
B
解析
： B is correct. An unbiased estimator is one for which the expected value equals the parameter it is intended to estimate. ： B正确。 无偏估计量是指期望值等于它要估计的参数的估计量。