a为啥不对

问题如下：

What is the reasonable explanation for a slope coefficient of 7 in a linear regression?

选项：

A.

For every one unit change in the independent variable the model predicts that the dependent variable will change by 0.7 units.

B.

The predicted value of the dependent variable when the independent variable is zero is 7.

C.

For every one unit change in the independent variable, the dependent variable will be most likely to change by 7 units in the same direction.

D.

The predicted value of the independent variable when the dependent variable is zero is 0.7.

解释：

C is correct.

考点：Linear Regression with One Regressor

解析：当斜率系数为7时，意味着每当自变量变动一个单位时，因变量会以相同的符号变动7个单位。