Standard Deviation



英文名稱:Standard Deviation 中文名稱:標準差
"標準差是衡量一系列數值中某一數值與其平均值偏離程度的指標。它用於估算價格可能的波動程度,其數值與價格波動範圍成正比。
e.g. The index is a weighted average of 85 existing monthly indicators of national economic activity, and is constructed to have an average value of zero and a standard deviation of one."

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