研究二种或二种以上变数的关系时,在生物统计学上一般采用回归和相关二种方法。回归:研究甲种变数变化时,乙种变数是否也有变化,例如作物产量与雨量多少是否有关?作物产量的高低因雨量的多少而变动,因此作物产量在统计上称为依靠变数(用 Y 表示),雨量称为独立变数(用 X 表示),依靠变 When studying the relationship between two or more variables, biometrics generally uses regression and correlation methods. Regression: Whether there is a change in B variables when studying the changes of A variables, for example, whether the crop yield is related to the amount of rainfall? The crop yield varies depending on the amount of rainfall. Therefore, the crop yield is statistically called the dependent variable (denoted by Y ), Rainfall is called an independent variable (X), relying on change