Trial consumes 10 degrees of freedom as a fixed effect in m5 but only
1 degree of freedom as a random effect in m1 and m3. The 11 different
Trials are NOT 11 different, completely unrelated entities wiht no
relation to one another, as assumed by m5. They are 11 different
instances
Hello all!
I have a problem that calls for a better understanding, than mine, of
how lme() uses the random part of the call.
The dataset consists of eleven field trials (Trial) with three
replicates (Block) and four fertiliser treatments (Treat). Analysing for
example yield with lme() is
