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

question 63

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. Using the estimation results given above,the predicted level of sales in 2022III is _______ units.

• A)141.5
• B)156
• C)172
• D)173.5
• E)none of the above

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Definitions:

Alarm Phase

The initial reaction of the body to stress, activating the sympathetic nervous system and the fight or flight response.

Blood Pressure

The force exerted by circulating blood on the walls of blood vessels, often measured for health assessment.

General Adaptation Syndrome

A three-stage response (alarm, resistance, exhaustion) that the body goes through when under stress, as proposed by Hans Selye.

Resistance Phase

The second stage of the general adaptation syndrome, characterized by the body's adaptation to a continuous stressor and an attempt to restore homeostasis.