does centering independent variables change main effects why do you need to center independent variables when you do a regression analysis why would main effect change when centering why do you center independent variables why do we need to center independent variables in multiple regression can centering independent variables affect the main effects why would centering independent variables make a difference in main effects why does it take center independent variables why does the centering of the independents change the main effect with moderation quizlet why do you centre independent variables for regression analysis what is the difference between centering and interaction why center independent variables how to center independent variables why would you center variables in an interaction study why would the main effect change with centering? why would it be necessary to center all independent variables why does the main effect change when centering variables why do you center independent variables why center independent variable why do we center independent variable during a regression analysis?