Consider an observed series Y₁, Y2,..., Y100 from an AR(1) model Y₁ = 0.7Y-1 + et. Would it be unusual if r₁ = 0.6? What about if r10 = -0.15? Justify your answers.

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Consider an observed series Y₁, Y2,..., Y100 from an AR(1) model Y₁ = 0.7Y-1 + et. Would it
be unusual if r₁ = 0.6? What about if r10 = -0.15? Justify your answers.
Transcribed Image Text:Consider an observed series Y₁, Y2,..., Y100 from an AR(1) model Y₁ = 0.7Y-1 + et. Would it be unusual if r₁ = 0.6? What about if r10 = -0.15? Justify your answers.
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