How do we think about how well our sample regression line fits our sample data?

我们怎样衡量我们的样本回归线拟合样本数据有多好呢？

Data from the regression line itself may be helpful to provide mathematical estimates of the degree of linearity.

来自回归线自身的数据可以用于提供线性程度的数学评估。

The correlation coefficient y-intercept slope of the regression line and residual sum of squares should be submitted.

应该提交其相关系数、Y轴截距、回归线斜率、残差平方和。

What Gauss did was said, let's fit a line through the point — the scatter of points — and that's called the regression line.

高斯说，做这样的一条直线，切合所有散点，这就是回归直线。