Help with Binary Logistic Regression

Posted by Cardiff Tyke on Jan 23, 2007; 11:31am
URL: http://spssx-discussion.165.s1.nabble.com/Help-with-Binary-Logistic-Regression-tp1073387.html

All,

I'm a newcomer to SPSS (hence, I don't understand most of the questions posted to this mailing list!) and I would like to ask members for help with a simple problem.

I'm currently running a binary logistic regression procedure to try and predict a simple yes or no response from subjects.  I have roughly 20000 records which each have around 30 variables.  The yes:no split of existing records is currently around 65%:35%.

However, when I run the SPSS regression procedure, the model predicts that all respondents will return a "yes" answer.  I realise that this could be down to purely having a set of unpredictive variables (although I hope not), but I'd like to remove all potential human (i.e mine) before I jump to any conclusions.

Can anyone offer some simple assistance to help me to get to the bottom of this problem?

Thanks,
JC


       
       
               
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