question: public static double sampleSkew ( int size , double moment3 , double sampleVariance ) { int n = size ; double s = Math . sqrt ( sampleVariance ) ; double m3 = moment3 * n ; return n * m3 / ( ( n - 1 ) * ( n - 2 ) * s * s * s ) ; }
target:  Returns the sample skew of a data sequence. Ref: R.R. Sokal, F.J. Rohlf, Biometry: the principles and practice of statistics in biological research (W.H. Freeman and Company, New York, 1998, 3rd edition) p. 114-115.