Given Cov(X,Y)=0.5Cov(X, Y) = 0.5Cov(X,Y)=0.5, Var(X)=1Var(X) = 1Var(X)=1, and Var(Y)=4Var(Y) = 4Var(Y)=4, what is the correlation coefficient ρ(X,Y)\rho(X, Y)ρ(X,Y)?
0.125
0.25
0.5
1