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(一)数学方法简述线性回归随机变量x和y间的线性回归方程可表达为y=ax+b.指数回归指数回归是线性回归的一种应用,通常可表达成y=ae~(bx).乘幂回归乘幂回归的表达式也可通过与指数回归同样的变换为y=a·x~b.标准差令由回归曲线得出的预测值为(?),则标准差的表达式为
(A) a brief description of mathematical methods Linear regression Random variables x and y between the linear regression equation can be expressed as y = ax + b. Index Regression Index regression is an application of linear regression can be expressed as y = ae ~ (bx ) .Expression of power regression The power of regression expression can also be transformed by the same index exponentiation as y = a · x ~ b. Standard deviation Let the regression curve derived predictive value (?), Then the standard deviation expression Type is