为什么样本方差 (sample variance) 的分母是 n-1？ - 知乎
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这篇文章解释了样本方差计算中分母为n-1而不是n的原因。它首先介绍了总体方差和样本方差的概念,然后用正态分布示例说明了为什么样本均值可以作为总体均值的无偏估计。最后通过推导证明,如果分母为n会低估总体方差,而分母为n-1可以消除这个偏差,从而得到无偏估计。Full descriptionUploaded byYang CaoAI-enhanced title and description
DownloadSaveSave 为什么样本方差 (sample variance)的分母是 n-1？ - 知乎 For LaterShare0%0% found this document useful, undefined0%, undefinedPrintEmbedReport0 ratings0% found this document useful (0 votes)186 views9 pages为什么样本方差 (sample variance) 的分母是 n-1？ - 知乎这篇文章解释了样本方差计算中分母为n-1而不是n的原因。它首先介绍了总体方差和样本方差的概念,然后用正态分布示例说明了为什么样本均值可以作为总体均值的无偏估计。最后通过推导证明,如果分母为n会低估总体方差,而分母为n-1可以消除这个偏差,从而得到无偏估计。
Read moreDownload0 ratings0% found this document useful (0 votes)186 views9 pages为什么样本方差 (sample variance) 的分母是 n-1？ - 知乎
这篇文章解释了样本方差计算中分母为n-1而不是n的原因。它首先介绍了总体方差和样本方差的概念,然后用正态分布示例说明了为什么样本均值可以作为总体均值的无偏估计。最后通过推导证明,如果分母为n会低估总体方差,而分母为n-1可以消除这个偏差,从而得到无偏估计。Full descriptionUploaded byYang CaoAI-enhanced title and description
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