Dummy Variables in SPSS?

Question

Dummy Variables in SPSS?

Answer 1

I don't think the other answer is correct. These are not coded as dummies when they are coded 1-5, although if you use the GLM procedure in SPSS, you can do that. You code them as dummies because if you enter them as they are you assume that the scores mean something and are in an order - i.e. that Hispanic is higher than Asian,. and white is higher than Black. By making dummies, you compare the means of the groups, which is what you are interested in. I'd suggest you read a book on regression, to help you to understand this. One example would be Applying regression and correlation by Jeremy Miles and Mark Shevlin. :)

Answer 2

I am not good with SPSS, I would recommend going to a math forum, or maybe the URCH forums, you are unlikely to find the right answer here reliably.

Answer 3

The dummy variables generated by the system will cause the parameter metrix to be only 0 and 1 ,and it will not be able to find the inverse correctly.That will show you senseless parameters and results. Adding not dummy variables in the system will help.Otherwise, you have to use the method developed for logistic problems directly, not regression analysis.