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

question 23

True/False

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,the best model based on the residual plots is the second-order autoregressive model.

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Definitions:

Industry Demand Curve

A graph showing the relationship between the price of a good and the total quantity demanded across the entire market.

Perfectly Competitive

A market scenario characterized by a large number of small firms competing against each other, where each firm makes negligible impact on market prices.

Positive Economic Profits

Earnings that exceed the opportunity costs of inputs, indicating that a firm is generating returns higher than the next best alternative use of its resources.

Market Price

The current price at which goods or services can be bought and sold in a marketplace, determined by supply and demand.