Statistics

Hello, I have a question concerning predictivity/ or R squared of two sets of variables.

what id like to do, is report r2,r2adjusted...
for two models

but i cant do hierarchical regression, because in the first set of variables I have two categorical variables (for ex. gender).

Now i fear I have to use GLm with dummies... I don't know how to do this. Wouldnt i be testing for difference between variances when using GLM?

Im working with spss, could someone give me a hint or a link to an explanation?

thank you very much

Joa

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