Let (Zt : t EZ) ~ IIDN(0, o'). Which of the following processes are not stationary? A: Xt = Zt cos(nt/7), B: Yt = Z+Zt-1
Let (Zt : t EZ) ~ IIDN(0, o'). Which of the following processes are not stationary? A: Xt = Zt cos(nt/7), B: Yt = Z+Zt-1 C: Vt = a+ bt+ Zt D: Ut = Ut-1+ Zt
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