what is dummy variable how do you use dummy variables what does adding dummy variables mean in regression analysis how many variables to have in multiple regression when do you add variables to a multiple regression model why are independent variables in a model different from dummy variable in a regression why is a dummy variable in multiple regression used which variable is used to compare dummy variable with independent variable when i add just one variable to my regression model, the independent variable are significant. why does that occur? why are independent variables dummy in a regression? does the dependent variable of one dummy variable have a significant significance are independent variables significant when comparing multiple regression analysis why do dummy variables differ in multiple regression when add dummy variable to regression model what is the result how does a dummy variable affect a linear regression model when do i add two dummy variables why does dummy variable mean independent variable when i add dummy variables do some variables get different coefficients how to do multiple regression model for dummy variables why are some independent variables in a multiple regression model not significant