在农学和生物学研究中,为找出较真实地反映两变量关系的回归方程,以往的方法是先在坐标纸上绘出散点图,根据散点图用专业知识判断相似于何种函数关系,建立回归方程,进行假设检验.如果假设不成立,则重新进行统计分析,如此这样进行多次才能得到配合较好的回归方程,此做法既麻烦又费时间.现在用电子计算机进行方程拟合,通过一次计算,就可根据所配方程的决定系数(R)和剩余标准误(S_0)选配合适的拟合方程. In the agronomy and biology research, in order to find the regression equation that more accurately reflects the relationship between the two variables, the previous method is to draw a scatter plot on the coordinate paper and use the scattergram to determine which function is similar to the professional knowledge Relations, the establishment of regression equations, the hypothesis test.If the hypothesis is not established, then re-statistical analysis, so in order to get better with the regression equation, this approach is cumbersome and time-consuming. Now use the computer to fit the equation , Through a calculation, according to the equation with the decision coefficient (R) and the remaining standard error (S_0) matching the appropriate fitting equation.