comparing 3 levels of fixed factor in lme4
On Jul 30, 2012, at 08:04 , Obermeier Andrew wrote:
In lme4, in models with 3 levels of the fixed factor, each of these gets a t value comparing it to a reference level. How is this done? It is my understanding that the t value can only be used to compare 2 means.
Then your understanding is wrong, and you need to read a text on basic linear modelling theory. Nothing specifically mixed-model or even R relevant about that.
Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com