Let w₁, W2,..., wt be independent random variables from a normal distribution with mean 0 and variance o2. Suppose find the followings. (a) E(xt). (b) Var(xt). (c) Cov(wt, wt-1). (d) Cov(xt, xt-1). xt = W₁ + W₂ + + Wtr

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Let w₁, W2, ..., wt be independent random variables from a normal distribution with
mean 0 and variance o².
Suppose
find the followings.
(a) E(xt).
(b) Var(xt).
(c) Cov(wt, Wt-1).
(d) Cov(xt, xt-1).
xt = W₁+ W₂ +
+ Wtr
Transcribed Image Text:Let w₁, W2, ..., wt be independent random variables from a normal distribution with mean 0 and variance o². Suppose find the followings. (a) E(xt). (b) Var(xt). (c) Cov(wt, Wt-1). (d) Cov(xt, xt-1). xt = W₁+ W₂ + + Wtr
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