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

question 121

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

---

Definitions:

Cost Behaviors

The analysis of how specific costs change in relation to changes in a company’s level of activity or volume of production.

Standard Direct Materials Price

The pre-determined cost per unit of raw materials expected to be incurred, utilized in budgeting and variance analysis.

Receiving Costs

Expenses associated with the reception of materials or goods from suppliers, including inspection, storage, and handling fees.

Freight Costs

Expenses associated with transporting goods from one location to another, which can include shipping, handling, and insurance fees.