| Variance -方差 方差就是一组数据中平均值与任意点之间的距离。 The Variance is the distance between the mean of a set of data to any point in the data.
Variation -差异 正常预期结果与观测结果之间的差额总量即为差异 The amount of difference between a normal expected output to the observed output is variation.
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