A Forecaster Used the Regression Equation $Q _ { t } = a + b t + c _ { 1 } D _ { 1 } + c _ { 2 } D _ { 2 } + c _ { 3 } D _ { 3 }$

question 18

Multiple Choice

A forecaster used the regression equation $Q _ { t } = a + b t + c _ { 1 } D _ { 1 } + c _ { 2 } D _ { 2 } + c _ { 3 } D _ { 3 }$ and quarterly sales data for 2004I-2021IV (t = 1,...,64) for an appliance manufacturer to obtain the results shown below.Q is quarterly sales,and $D _ { 1 } , D _ { 2 }$ and $D _ { 3 }$ are dummy variables for quarters I,II,and III. The estimated QUARTERLY increase in sales is ______ units,and the estimated ANNUAL increase in sales is ______ units.

• A)1.5; 6
• B)1.4; 4
• C)30; 4
• D)1.5; 40
• E)none of the above

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Definitions:

Business Majors

Students specializing in business-related disciplines such as finance, marketing, management, or accounting during their tertiary education.

Population

The entire group of individuals or instances about whom the study is concerned, from which a sample may be drawn for analysis.

Descriptive Statistics

The branch of statistics that deals with the organization, display, and description of data sets.

Summaries

Concise explanations or overviews that encapsulate the main points or data from a larger set of information.