标准差系数，又称为均方差系数，离散系数。它是从相对角度观察的差异和离散程度，在比较相关事物的差异程度时较之直接比较标准差要好些。
双语例句原声例句
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提供了一个在数学期望值不相等条件下进行概率分析的新方法，该方法采用所谓标准差系数作为分析指标。
Using the standard deviation coefficient as analysis target, the author provides a new probability analysis method, in case the mathematical expectations are different.
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在销售量为随机变量的时候，本文利用标准差系数来讨论销售量、税息前收益和税后收益的波动程度之间的联系。
This thesis is to analyze the coefficient of standard deviation of the earnings before interest and tax and the earnings per share.
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其次，相比一个标准差的美国幸福感（即0.635），这对大多数变量系数看起来很小。
Second, when compared to the size of one standard deviation of Americans' reported happiness (which is 0.635), the coefficients on most of these variables look small.
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It is defined as rho= That's the correlation coefficient.
定义为,rho等于xy的协方差比xy各自的标准差的乘积,这就是相关系数
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