Question: a. What kind of variable should you create in order to include information about a categorical variable among your X variables? Please give the name

a. What kind of variable should you create in order to include information about a categorical variable among your X variables? Please give the name of the variables and indicate how they are created.
b. For a categorical variable with four categories, how many indicator variables would you create?
c. What does the regression coefficient of an indicator variable indicate?

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