感觉很多是一级的考点，像这种二级考试里会遇到吗？

问题如下：

4. The most appropriate interpretation of the multiple R-squared for Hansen’s model is that:

选项：

unexplained variation in the dependent variable is 36 percent of total variation.

correlation between predicted and actual values of the dependent variable is 0.36.

correlation between predicted and actual values of the dependent variable is 0.60.

解释：

C is correct.

The multiple R-squared for the regression is 0.36; thus, the model explains 36 percent of the variation in the dependent variable. The correlation between the predicted and actual values of the dependent variable is the square root of the R-squared or $\sqrt{0.36}= 0.60$.