...矩 3、写出回归方程 ，画出回归直线 4、对回归方程进行假设检验 bX a Y ? 75 b 为回归系数(coefficient of regression) 即直线的斜率。 b>0，表示随x增加，y亦增加； b<0，表示随x增加，y值减少； b=0，表示回归直线与x轴平行，意为y与x无关。
2
?热带系数
... standard error(se)规范误 coefficient of regression热带系数 inferior limit下限 ...
Correlative coefficientofregression is over 0.99 on the condition of experiment.
试验条件下回归方程相关系数均在0.99以上。
2
It is found that the more the variance explained by the linear model, the smaller the standard deviation ofregressioncoefficient.
拟合方差与回归系数标准偏差存在明显的相关关系。线性模型能解释的方差越大，回归系数标准偏差越小。
3
On the basis of a large number of field test data, the regressionof the displacement coefficient and system efficiency for pumping unit wells were established.