Hi everyone,
I just got S-Plus 2000, and us it to fit a GLM model. With only main
effects, the model produces sensible results, but an interactive effect
is added, the model produces a extraordinarily large negative deviance
for the interactive effect, making the model residual deviance much
larger than the one without the interactive effect. Does this mean
adding the interactive effect is not sensible or the program has some
problem, because in most cases, adding another fact will help explain
more of the variation?
Does anybody have any experience about this? I thank you in advance and
look forward to any advises.
Your sincerely
Yimin Ye
-----------------------------------------------------------------------
This message was distributed by s-news@wubios.wustl.edu. To unsubscribe
send e-mail to s-news-request@wubios.wustl.edu with the BODY of the
message: unsubscribe s-news
|