也谈由相对数或平均数计算平均数

Rethinking Calculation of Averaging through Relative Number or Average Number

在由相对数或平均数求平均数时,可以以这一相对数或平均数的分母或分子为权数,对这一相对数或平均数进行加权,利用加权算数平均数的频数公式或加权调和平均数公式求其平均值.

When using relative number or average number to get averaging, you may use denominator or numerator of this relative number or average number as weight number to weigh the relative number or average number,and use frequency formula or weighted harmonic mean formula of weighted arithmetic mean formula to get its mean value.