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Q173Section III (Statistics)173 of 190

The random-phase sinusoid has autocovariance 12cos⁡(ωh)\tfrac12\cos(\omega h)

Let {Xt}\{X_t\} be a time series defined as Xt=Asin⁡(ωt+B)X_t=A\sin(\omega t+B), where E(A)=0E(A)=0, Var⁡(A)=1\operatorname{Var}(A)=1, B∼Uniform(−π,π)B\sim\text{Uniform}(-\pi,\pi) and A and B are independent. Then, hh-lag covariance function r(h)r(h) is:

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