Dummy Coding Variables

Posted by Bella Riley on Apr 18, 2013; 9:09pm
URL: http://spssx-discussion.165.s1.nabble.com/Dummy-Coding-Variables-tp5719548.html

Hi all,

Just got a quick question from an SPSS newbie.

I'm running a regression on vehicle registrations (as a proxy for vehicle demand) and wanted to use the marque as an independent variable. As it's categorical, I read that it was best to conduct dummy coding to create several dichotomous variables- I hope this is true!

I now have 25 of these (dummy coded) variables and am wondering what to do next? Do I include them in the regression model or run ANOVA analysis with them as the only independent variables and exclude them from the complete model which contains the other independent variables?

Any pointers would be greatly appreciated!

Best,

Ashley Morris