Displaying 1 result from an estimated 1 matches for "haemolymph".
2007 Mar 22
0
accounting for overdispersion in poisson distribution with lmer procedure
...r overdispersion. Actually the results are not very
different to what I get when specifying a poisson distribution although my
data are clearly overdispersed.
this my model:
>model <- lmer(NB ~ T + volume + (G|col) , data=immuno15,
>family=quasipoisson)
where
- NB is bacterial count in haemolymph of ants 10h after bacteria
injection(measure of immunocompetence)
- T is the treatment applied to ants
- volume is the volume of haemolymph sample from ants
- col is the colony of origin of ants, which is a random factor
I know it's possible to get a estimator of overdispersion with:
>sum....