... 均方半径 mean square radius 均方差判据 mean-variance criterion 均方差误 mean-squared error (mse); meansquared errorr ...
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It is proved that there is no best estimator in the class under mean-squared-error criterion and the Analysis-of-variance (ANOVA) estimator is also inadmissible.
证明了在均方误差准则下，在该估计类中不存在一致最优不变估计，且方差分析估计是不容许估计。
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