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A) A variable that measures the correlation between two quantitative variables.
B) A categorical variable converted into a numerical format for regression analysis.
C) A variable that is not used in the regression model.
D) A variable that always takes a value of zero.
B. A categorical variable converted into a numerical format for regression analysis
B. A categorical variable converted into a numerical format for regression analysis.
B) A categorical variable converted into a numerical format for regression analysis. Dummy variables allow regression models to incorporate categorical data by assigning binary values (0 or 1) to represent different categories.