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NO.PZ2015120604000122 问题如下 The varianof sample meis smallest of all unbiaseestimators, whiof the following cscrithis properity ? A.The estimator is efficient. B.The estimator is consistent. C.The estimator is accuracy. A is correctIf estimator's varianof sampling stribution is smallest of all unbiaseestimators , the estimator is vieweefficient.如果一个估计量的抽样分布的方差在所有无偏估计量中是最小的,则该估计量会被视为有效的估计量。 答案的这句话没看懂,麻烦一下
可以翻译一下题干吗尤其是上半句…
每个词都能看懂,但是每次都是做不对,怎么更好的辨别这几个词?
Efficiency的情况不是说Sampling equto other unbiaseestimato么?为什么是smaller?