问题如下：
6. Is the relationship between the ratio of cash flow to operations and the ratio of net income to sales significant at the 5 percent level?
选项：
A.No, because the R-squared 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 F and t for the slope coefficient are less than 0.05.
解释：
C is correct.
The p-value reflects the strength of the relationship between the two variables. In this case the p-value is less than 0.05, and thus the regression of the ratio of cash flow fromoperations to sales on the ratio of net income to sales is significant at the 5 percent level.
significant at 5%?
1.这里的原假设是二者关系=0 ？
2.然后在5% 的范围内是接受域， 就是原假设在接受域是不显著的？
3。=0是否意味着x和Y无关？
4.如果是接受就是 not significant , 如果拒绝就是significant？
5.是不是所有significant都是检验x和Y是否为0 接受就是not significant？
