令 x,y,z 表取自三獨立常數母體之樣本變異數,當n為不小於2之整數時,本文討論P(x>y)之計算及其性質.當n為不小於3之奇數時,本文討論P(x>y>z)之計算及其性質.Let x,y and z denote sample variances obtained from three independent normal distributions.Each sample variance has sample size n.The purpose of this paper is to calculate P(x>y) when n=2 or n>2 and P(x>y>z) when n is odd.