SCENARIO 16-13 Given Below Is the Monthly Time Series Data for U.S.retail

question 84

Essay

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 1^st month is 0:
Linear trend model:

Quadratic trend model:
Third-order autoregressive::

Below is the residual plot of the various models:

-Referring to Scenario 16-13,construct a scatter plot (i.e. ,a time-series plot)with month on the horizontal X-axis.

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Definitions:

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