Which of the following are features of a weakly stationary stochastic process?
(A) Mean is time-varying
(B) Mean is constant
(C) Variance is constant
(D) Covariance is time-invariant
Choose the correct answer from the options given below:
1
(B) and (C) Only
2
(B), (C) and (D) Only
3
(A), (C) and (D) Only
4
(A) and (C) Only