几何平均是一种常规的平均方法。 若有N个数，则这N个数的积开N次方就是N个数的几何平均值。 几何平均数是N个数据的连乘积的开N次方根。 算术平均数是一组数据的代数和除以数据的项数所得的平均数。
ns 172.70.178.96da2
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