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

question 15

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 a 5 percent significance level,these estimation results indicate that sales in

• A)the first quarter are greater than sales in any other quarter.
• B)the second quarter are greater than sales in any other quarter.
• C)the third quarter are greater than sales in any other quarter.
• D)the fourth quarter are greater than sales in any other quarter.

---

Definitions:

Social

Relating to society or its organization, focusing on the interactions and relationships among individuals within a community.

External Validity

Similarity between circumstances surrounding an experiment and circumstances encountered in everyday life.

Anderson And Bushman

Researchers known for their work on the effects of media violence on aggression.

Aggression

Behavior intended to harm or injure another individual, either physically or psychologically.