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生命现象常常受多种因素所左右。研究问题有时就需要考虑多种因素之间的关系。定义:当有M个自变数(X_1、X_2、……X_M)同时对一个依变数(y)发生作用时,我们运用数理统计方法使其他一些自变数保持不变而分别考察某1个自变数与依变数的回归与相关关系,称为净回归与净相关;如果我们综合考察M个自变数与依变数的总的回归与相关关系,则称为复回归与复相关。一、净回归与复回归当只有1个自变数(x)与1个依变数(y)时,我们用回归方程y=a+bx来表达x与y的回
The phenomenon of life is often influenced by many factors. Research problems sometimes need to consider the relationship between a variety of factors. Definition: When there are M independent variables (X_1, X_2, ..., X_M) acting on an dependent variable (y) at the same time, we use mathematical statistics to keep other independent variables unchanged and examine one independent variable And dependent variable regression and correlation, known as net regression and net correlation; if we comprehensively examine the total regression and correlation between M independent variables and dependent variables, then known as complex regression and complex correlation. First, the net return and complex return When there is only one independent variable (x) and an dependent variable (y), we use the regression equation y = a + bx to express the x and y back