Probability and Statistics

If $b_{yx}$ and $b_{xy}$ are the two regression coefficients, the Pearson correlation coefficient $r$ satisfies:

Options:

• (A) $r = \pm \sqrt{b_{yx} b_{xy}}$
• (B) $r = b_{yx} + b_{xy}$
• (C) $r = \frac{b_{yx}}{b_{xy}}$
• (D) $r = b_{yx} b_{xy}$