协方差分析是将回归分析和方差分析结合起来的一种统计方法。根据变异来源将自由度和平方和裂开,这叫方差分析。当有二类变数时,我们也可以按照变异来源,将自由度和乘积和裂开,这就叫协方差分析。由于乘积和是回归分析的一个基本特征数,乘积和同平方和同时按变异来源裂开,就使回归分析和方差分析能够结合起来应用。协方差分析可以用来测定回归方程间的异同。假使我们有k个直线回归样本,它们是有 Covariance analysis is a statistical method that combines regression analysis with analysis of variance. According to the source of variation will be the degree of freedom and square root split, called an analysis of variance. When there are two types of variables, we can also follow the source of variation, the degrees of freedom and products and split open, which is called covariance analysis. Since the product sum is a basic feature of regression analysis, the product and the square and the source of mutation at the same time split open, so that regression analysis and analysis of variance can be combined to apply. Covariance analysis can be used to measure the similarities and differences between regression equations. If we have k linear regression samples, they are there