I am sorry all.
(1)Suppose two random variables X and Y are positively correlated, If X is above its mean, then Y is also above its mean'?
(2)If two events A and B are not correlated, then P(B)P(A) = P(A and B)
Thanks a lot !!
I am sorry all.
(1)Suppose two random variables X and Y are positively correlated, If X is above its mean, then Y is also above its mean'?
(2)If two events A and B are not correlated, then P(B)P(A) = P(A and B)
Thanks a lot !!