population covariance 双语例句
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1·Three approaches to Multivariate quality control are introduced. The first approach is to control the mean vector and covariance matrix of multivariate population in terms of one statistic.
介绍三种对多指标的质量控制方法,第一种方法是用一个标量控制多变量总体的均值向量和协方差矩阵;
