[Visitor (112.0.*.*)]answers [Chinese ]  Time :20191130  Correlation and regression refers to the existence of a certain relationship between variables, but it is not as rigorous as a functional relationship. This relationship is a correlation relationship and variables are said to be related. If the correlation is linear, the variables are said to be linearly correlated. If there is a correlation between the variables, we need to study the quantitative relationship of one variable with the other variables (or affected by it).
This variable is called the dependent variable, and other variables are called independent variables. The quantitative relationship between the dependent variable and the independent variable is called the dependent variable's independent variable regression. Statistically, the method of studying the correlation between variables is called correlation analysis, and the method of studying the quantitative relationship of dependent variables affected by independent variables is called regression analysis. 
