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方差迭代公式推导
2022-07-03 06:18:00 【昼行plus】
原文参考的:https://blog.csdn.net/weixin_44479136/article/details/90510374
但里面有些公式写错了,看着别扭……
并且没有方差的推导……
为了方便查看,顺便加强理解记忆,自己推一遍
术语约定
均值:
E n = 1 n ∑ i = 1 n
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