B选项中 3 to 4 times是怎么算粗来的？

问题如下：

At a 0.01 level of significance, Jones should conclude that:

选项：

A.the mean net profit margin is 0.5987%. B.the variation of the fixed asset turnover explains the variation of the natural log of the net profit margin C a change in the fixed asset turnover from 3 to 4 times is likely to result in C.a change in the net profit margin of 0.5987%.

解释：

B is correct. The p-value corresponding to the slope is less than 0.01, so we reject the null hypothesis of a zero slope, concluding that the fixed asset turnover explains the natural log of the net profit margin.