search for: haemolymph

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....