[R] Logistic regression X^2 test with large sample size (fwd)

2012-07-31 Thread M Pomati
Does anyone know of any X^2 tests to compare the fit of logistic models which factor out the sample size? I'm dealing with a very large sample and I fear the significant X^2 test I get when adding a variable to the model is simply a result of the sample size (200,000 cases). I'd rather use

Re: [R] Logistic regression X^2 test with large sample size (fwd)

2012-07-31 Thread Marc Schwartz
On Jul 31, 2012, at 10:35 AM, M Pomati marco.pom...@bristol.ac.uk wrote: Does anyone know of any X^2 tests to compare the fit of logistic models which factor out the sample size? I'm dealing with a very large sample and I fear the significant X^2 test I get when adding a variable to the

Re: [R] Logistic regression X^2 test with large sample size (fwd)

2012-07-31 Thread M Pomati
Marc, thank you very much for your help. I've posted in on http://math.stackexchange.com/questions/177252/x2-tests-to-compare-the-fit-of-large-samples-logistic-models and added details. Many thanks Marco --On 31 July 2012 11:50 -0500 Marc Schwartz marc_schwa...@me.com wrote: On Jul 31,

Re: [R] Logistic regression X^2 test with large sample size (fwd)

2012-07-31 Thread David Winsemius
On Jul 31, 2012, at 10:25 AM, M Pomati wrote: Marc, thank you very much for your help. I've posted in on http://math.stackexchange.com/questions/177252/x2-tests-to-compare-the-fit-of-large-samples-logistic-models and added details. I think you might have gotten a more statistically