Let 5x t t 1, 2, ) be a covariance stationary process and define h Cov(x t , x t h ) for h 0 Therefore, 0 Var (x t ) Show that Corr (x t , x t h ) h 0

Question: Let {5x t : t = 1, 2, . . .) be a covariance stationary process and define h = Cov(x t , x

Let {5x_t: t = 1, 2, . . .) be a covariance stationary process and define γ_h = Cov(x_t, x_t+h) for h ≥ 0. [Therefore, γ₀ = Var (x_t).] Show that Corr (x_t, x_t+h) = γ_h/γ₀.

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