NO.PZ202109130200003903
问题如下：
The interpretation of the slope is the:
选项：
A.change in the annual growth rate of the money supply per year B.average annual growth rate of the money supply after the shift in policy C.difference in the average annual growth rate of the money supply from before to after the shift in policy解释：
C is correct. Whereas the intercept is the average of the dependent variable when the indicator variable is zero (that is, before the shift in policy), the slope is the difference in the mean of the dependent variable from before to after the change in policy.
题目问的就是这个斜率的理解，在这里斜率就是-5.13912，然后就是变化前后的差，就是他们的均值。是这样吗？总感觉是英语的理解问题。
