1. [-/1 Points] DETAILS MENDSTAT15 13.MC.005. MY N In multiple regression analysis, which procedure permits variables to enter and leave the modes at different stages of its develcoment? a. Qbackward elimination buchi square test c. Oresidual analysis if Ofurward selection e. Ostepaise regression 2. [-/1 Points] DETAILS MENDSTAT15 13.MC.009. MY NO Which of the following statements is correct? a. OThe number of dummy variables that must be added to a regression model is one less than the number of categories for a qualitative Independent variable. b. DA dummy variable is incorporated into a regression model'if the deperident variable is quantitative C Oincluding a dummy variable into a regression model will simplify the regression results and help people to interpret the meaning of the regression parameters. it OThe number of chummy variables that must be added to's regression model is one more than the number of categories for a qualitative independent variable e, Call of these