Re: Help with Binary Logistic Regression

Posted by Björn Türoque on Jan 23, 2007; 1:01pm
URL: http://spssx-discussion.165.s1.nabble.com/Help-with-Binary-Logistic-Regression-tp1073387p1073398.html

You might be having a problem with missing values, do you have a skip
pattern in your data,? i.e. some variables are not collected for people who
fit a certain set of criteria. Take a look at how your data is entered and
stored, understanding how your data is structured is a great way to remove
human error.

Don

On 1/23/07, Cardiff Tyke <[hidden email]> wrote:

>
> 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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