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苏·Xu · 2023年06月30日

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NO.PZ202106160300004303

问题如下:

Based on Exhibits 1 and 2, the correlation between the debt ratio and the short interest ratio is closest to:

选项:

A.-0.3054 B.0.0933 C.0.3054

解释:

A is correct. In simple regression, the R2 is the square of the pairwise correlation. Because the slope coefficient is negative, the correlation is the negative of the square root of 0.0933, or -0.3054.

哪里得知是负的?

1 个答案

星星_品职助教 · 2023年07月01日

​同学你好, case表格Exhibit 2中给出debt ratio的coefficient是负数,即X变量debt ratio和Y变量short interest ratio是负相关的关系。

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