Chapter 11: Nonstationary Time Series Practice Question set contains 18 pages covering the following learning objectives:

* Describe linear and nonlinear time trends.

* Explain how to use regression analysis to model seasonality.

* Describe a random walk and a unit root.

* Explain the challenges of modeling time series containing unit roots.

* Describe how to test if a time series contains a unit root.

* Explain how to construct an h-step-ahead point forecast for a time series with seasonality.

* Calculate the estimated trend value and form an interval forecast for a time series.

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