Which of the following is true for the correlation coefficient ρ(X,Y)\rho(X, Y)ρ(X,Y)?
−1≤ρ(X,Y)≤1-1 \le \rho(X, Y) \le 1−1≤ρ(X,Y)≤1
0≤ρ(X,Y)≤10 \le \rho(X, Y) \le 10≤ρ(X,Y)≤1
ho(X,Y) ho(X, Y)ho(X,Y) must be non-negative
ho(X,Y) ho(X, Y)ho(X,Y) can be any real number