Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: FW: Goodness of fit: Chi2 vs Wald test results


From   Ahmed_Doha <Ahmed_Doha@carleton.ca>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: FW: Goodness of fit: Chi2 vs Wald test results
Date   Sat, 8 Oct 2011 23:52:32 -0400

Hi

I'm running an xtgee analysis on a panel dataset. Chi2 increases from model to model as I incrementally include the criterion variables of interest block after block. Chi2 increases from 1147 for the base model to 2171 for the final model, which should be used for interpretation. Given the definition of Chi2, (predicted - expected)2/expected, an increasing Chi2 indicates worsening of fit. On the other hand Wald tests, on the incrementally included blocks of variables, are significant which indicates improvement of fit.

I'm not sure how to interpret these mixed indicators in assessing the final model's goodness of fit.

Thank you for any help on this.

Ahmed Doha

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index