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SCENARIO 16-13 Given below is the monthly time series data for U.S.retail sales of building materials over a specific year. The results of the linear trend, quadratic trend, exponential trend, first-order autoregressive, second-order autoregressive and third-order autoregressive model are presented below in which the coded month for the
month is 0:
Below is the residual plot of the various models:
-Referring to Scenario 16-13, you can conclude that the third-order autoregressive model is appropriate at the 5% level of significance.
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