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

question 10

Short Answer

TABLE 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: Exponential trend model: First-order autoregressive: Second-order autoregressive: Third-order autoregressive: Below is the residual plot of the various models:
-Referring to Table 16-13,what is your forecast for the 13^th month using the linear-trend model?

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Definitions:

Sales Commissions

Financial compensation paid to sales representatives, usually a percentage of the sales they generate, as an incentive to increase sales performance.

Indirect Labor

Labor costs of employees who support the production process but are not directly involved in the active production of goods or services.

Manufacturing Overhead

All indirect costs associated with the manufacturing process, excluding direct materials and direct labor costs.

Direct Labor

The compensation and perks given to workers directly engaged in creating goods or delivering services.