这道题的考点？

问题如下：

Testing whether there is a change in the money supply growth after the shift in

policy, using a 0.05 level of significance, we conclude that there is:

选项：

A.

sufficient evidence that the money supply growth changed.

B.

not enough evidence that the money supply growth is different from zero.

C.

not enough evidence to indicate that the money supply growth changed.

解释：

A is correct. The null hypothesis of no difference in the annual growth rate is

rejected at the 0.05 level: The calculated test statistic of −8.16188 is outside the

bounds of ±2.048.