为什么小学初中学的样本方差分母是 N,可到了大学学管理统计学的时候方差分母却是 N–1 �? 知乎 Template


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tomski为什么小学初中学的样本方差分母是 n,可到了大学学管理统计学的时候方差分母却是 n–1 coloring