解读随机变量与不同位置特征值的变差

he variation exists in all procedure declaration statistical analysis central content is the data variation degree measure and the decomposition, thus has the data the difference explanation is clear. However the variation is not only the random variable and the mean value is separated the degree the variation target, the variation should also be the random variable and the different position characteristic value is separated the degree the variation target. Has the necessity based on such ponder this article to carry on the new explanation to the variation.