Re: POSTHOC and ETA values disagree

From: "Leonid Gibiansky" leonidg@metrumrg.com Subject: Re: [NMusers] POSTHOC and ETA values disagree Date: Fri, July 1, 2005 8:03 am Doug, POSTHOC is a separate computation useful to check assumptions used in the building of the population model (e.g., normality of the random effect distributions). My point was that if the fit is good enough with constant ETA(4) (and nearly constant ETA(5)) you may try to insert this information into the population model by requesting OMEGA(4,4) = 0 (OMEGA(5,5)=0). If the fit of the simplified model is good, I do not see any reasons in keeping extra effects in the model. 3-4% variability of the parameter (as you have for ETA(5)) usually can be ignored. You may also try HYBRID method for ETA(4). Leonid _______________________________________________________