Adjust for Different Slopes Using Interaction Terms in Multiple Regression

question 9

Multiple Choice

Adjust for different slopes using interaction terms in multiple regression.
-A sample of 30 companies was randomly selected for a study investigating what
Factors affect the size of company bonuses. Data were collected on the number of
Employees at the company and whether or not the employees were unionized (1 = yes,
0 = no) . What does the scatterplot of these data (shown below) suggest?

• A) Using Union as an indicator variable in this model is appropriate.
• B) Using the interaction term Employees*Union in the model is appropriate.
• C) Union should not be included in the model as a variable.
• D) Employees should not be included in the model as a variable.
• E) None of the above.

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Definitions:

Habitat Isolation

A type of prezygotic barrier where two species that could interbreed do not, because they inhabit different habitats and rarely encounter each other.

Environmental Isolation

The separation of population groups by physical barriers or distances, leading to genetic divergence and potentially speciation.

Biological Isolation

The separation of populations of the same species or different species that prevents genetic exchange, often leading to speciation.

Temporal Isolation

A mechanism that prevents species from mating because they breed at different times, contributing to reproductive isolation and speciation.