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？
