Question

if r=0 the cov (X,Y) is​

Answer 1

Answer:

Covariance can be positive, zero, or negative. ... If X and Y are independent variables, then their covariance is 0: Cov(X, Y ) = E(XY ) − µXµY = E(X)E(Y ) − µXµY = 0 The converse, however, is not always true. Cov(X, Y ) can be 0 for variables that are not inde- pendent.