skewness怎么计算？

[ArthurW]

桂诗春/宁春岩的《语言学方法论》第320-321页提到了偏态值和峰值的计算公式，并提到
偏态的另一个常用公式更精确：
g1=sqrt(n)*Sigma((x-mean)^2)/(Sigma((x-mean)^2)^(2/3)
以作者的例子而言，作者说结果为-0.1671。但从公式来看其结果必然是正值，所以这个公式肯定是有排版错误，特向各位请教一下，这个公式的正确形式应该是什么？

 

[iCasino]

回复: skewness怎么计算？

The following info is from wikipedia. However, I am not quite sure whether it is pertinent to your question.

For a sample of n values the sample skewness is

 

[ArthurW]

回复: skewness怎么计算？

The following info is from wikipedia. However, I am not quite sure whether it is pertinent to your question.

For a sample of n values the sample skewness is

Thanks iCasino, your info is directly pertinent (though i can't see the png in my browsers, Firefox or IE). Thanks again!