欢欢 · 2021年11月09日

哪里看出斜率是正的？以及coefficient of determination为什么不能用表格里的regression square除以total square

1. CFA I
2. Quantitative

* 问题详情，请 查看题干

NO.PZ202106160300004102

问题如下：

The correlation between X and Y is closest to:

选项：

A.-0.7436. B.0.7436 C.0.8623

解释：

C is correct. Because the slope is positive, the correlation between X and Y is simply the square root of the coefficient of determination:

$\sqrt {0.7436}=0.8623$

如题。。。。。。。。。