问题往往在于算数平均数和几何平均数之间的选择。
The question is often framed as the choice between arithmetic and geometric means.
是将原始分数转换后的分数，可说明原始分数距离算数平均数一个标准差单位是多少。
A transformed score in where the original score is expressed as the distance from the mean in standard deviation units.
更常见的计算方法被成为算数平均法，或者简单平均数。
The more common method of calculating averages is known as the arithmetic mean, or simple average.
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