NO.PZ202109130200004303
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.
在coefficient中不是给了吗,为什么用R?