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方差越小越稳定吗
更新时间: 2020-11-08 00:00:00  

方差是各个数据与平均数之差的平方的平均数。差自然是越小越稳定。在概率论和数理统计中,方差(英文Variance)用来度量随机变量和其数学期望(即均值)之间的偏离程度。

关键词: 稳定

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