NO.PZ202106160300004104
问题如下：
Is the relationship between the ratio of cash flow to operations and the ratio of net income to sales significant at the 0.05 level?
选项：
A. No, because the R2 is greater than 0.05
B. No, because the p-values of the intercept and slope are less than 0.05
C. Yes, because the p-values for Fand t for the slope coefficient are less than 0.05
解释：
C is correct. The p-value is the smallest level of significance at which the null hypotheses concerning the slope coefficient can be rejected. In this case, the p-value is less than 0.05, and thus the regression of the ratio of cash flow from operations to sales on the ratio of net income to sales is significant at the 5% level.
这个题我清楚是拒绝B1不等于0的，但题问的是X和Y之间关系在5%下是显著还是不显著，这个问法理解起来就有点绕了。应该是在5%的显著性水平下，B1是显著不等于0的。和答案的如何联系理解？
