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如何用方差标准差衡量离散程度
更新时间: 2020-07-01 00:00:00  

先求方差,方差越大的离散度越大标准差是方差的平方根,仍然是越大越分散。但标准差在单位上和需计算的数据一样,比如,计算几个长度数据的方差,单位是平方米,而标准差由于开了根号,单位仍然是米。

关键词: 何用 标准 衡量 离散 程度

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