The following regression model has been proposed to predict sales at a fast food outlet. 
a.What is the interpretation of 15 (the coefficient of X3)in the regression equation?
b.Predict sales for a store with 2 competitors,a population of 10,000 within one mile,and one drive-up window (give the answer in dollars).
c.Predict sales for the store with 2 competitors,a population of 10,000 within one mile,and no drive-up window (give the answer in dollars).
Definitions:
Control Groups
Control Groups are used in experiments as a benchmark to measure the effect of a variable, ensuring that results are due to the intervention and not other factors.
Psychotherapy
A therapeutic treatment primarily involving talking and interaction between a therapist and a patient to heal and alleviate mental and emotional problems.
Ethical Concern
Considerations related to the morality and principles guiding decisions, often arising in situations where choices affect well-being or rights of individuals and communities.
Human Laboratory Studies
Research conducted in controlled, laboratory settings that involve human participants to investigate a wide range of psychological, physiological, or behavioral phenomena.
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