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

question 126

Short Answer

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,what is the p-value for the t test statistic for testing the significance of the quadratic term in the quadratic-trend model?

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Definitions:

Sunk Cost

Costs that have already been incurred and cannot be recovered, which should not influence future business decisions.

Period Cost

Expenses that are not directly tied to the production process and are charged to the period in which they are incurred.

Future Decisions

Decisions that will be made in the future, often based on forecasts or projections.

Variable Cost Method

A pricing strategy that only accounts for direct materials, direct labor, and variable manufacturing overhead costs, excluding any fixed costs from its calculations.