Which of the Following Is the Equation Used for Computing $r_{x y}=\operatorname{cov}(X, Y)\left(s_{x} S_{y}\right)$

Multiple Choice

Which of the following is the equation used for computing the sample correlation coefficient?

A) $r_{x y}=\operatorname{cov}(X, Y) \left(s_{x} S_{y}\right)$

B) $r_{x y}=\frac{\operatorname{cov}(X, Y) }{s_{x} s_{y}}$

C) $r x y=\frac{\left(x_{i}-\bar{x}\right) }{s_{x} s_{y}}$

D) $r_{x y}=\sqrt{\frac{\left(x_{i}-\bar{x}\right) }{s_{x-s_{y}}}}$