Hi
I get the following message when running spss logistic regression with 13 explanatory variables and 12 interaction terms (the last variables in the first list has been entered as interaction term with the rest)
I am using spss version19
Can anyone explain, what should I do about it, presume have too many interactions
"Warnings Due to redundancies, degrees of freedom have been reduced for one or more variables. "
Regards
Ann
Ann E Fitzmaurice
Medical Statistician
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