why use a dummy variable how to use dummy variable regression? can you regress the values on the y and x how to regress using dummy variables in r why do you use dummy variables in the sigma regression how to do dummy regression in r what is the difference between a dummy and linear regression which function do i want to regress in r using dummy variables what type of regression is r used how to regress linear regression which type of regression requires a dummy variable dummy regression example in r can you use a dummy r regression can i use dummy variables for x what type of regression is used in r? why use dummy variables how to use a dummy regression in r what is the purpose of a dummy function? dummy variable definition in r can you use dummy variable and a linear regression