Question

the covariance between X and Y variables is + 12.3 and variances of X and Y are respectively 13.8 and 16.4. Find the Karl Pearson’s coefficient of correlation between them.​

Answer 1

Explanation:

Covariance (x, y) = 12.3

variance of (x) = 13.8

variance of (y) = 16.4

$r = covariance (xy) \div \sqrt{v(x) \: \times (y)}$

$r = 12.3 \div \sqrt{13 .8 \times 16.4}$

r = 0.817819