0
$\begingroup$

Cov(x,y) if e(x) = 2.60 and e(y) = 2.35 and e(xy) = 7.06

i'm confused because all i know is $$cov(x,y) = \text{correlation of xy}*sqrt(x)*sqrt(y) $$

$\endgroup$
2
  • $\begingroup$ You can find many formulas by searching our site for covariance definition. I have pointed to one such post; it was the first one found in my search. $\endgroup$
    – whuber
    Jun 9, 2015 at 15:36
  • $\begingroup$ So should i expand cov(x,y) = E((x-e(x))(y-e(y))) ? $\endgroup$
    – Ivan
    Jun 9, 2015 at 15:59

0

Browse other questions tagged or ask your own question.