can the dummy be a single variable what is the rule for dummy variables in regression is it necessary to use dummy variables in multiple regression when the number of independent variables is too large to determine the correct regression what are the limits of t why are it necessary to use stepwise regression can regression models be used for dummies only why is it necessary to use dummy variables which variables should be included in a dummy regression model? when to use dummy variables in multiple regression how many variables for regression how many independent variables in linear regression when to use dummy variables for regression why does stepwise regression need a dummy for validation when to use multivariate regression why does stepwise regression fail? can you keep dummy variables when using dummy model in regression what happens which variable is considered dummy in a regression model? how is the m in regression validated