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  3. (1) what two plots might you use to check whether

(1) What two plots might you use to check whether a given time series is stationary?...

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Statistics

(1) What two plots might you use to check whether a given timeseries is stationary? How are they used?
(2) What plot might you use to determine the order of an MAprocess? What plot might you use to determine the order of an ARprocess? How are they used?
(3) After fitting a time series model, what two plots mightyou use to assess whether the fitted model is appropriate? How arethey used?

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