Author: lortie

Overdispersion tests in #rstats

A brief note on overdispersion Assumptions Poisson distribution assume variance is equal to the mean. Quasi-poisson model assumes variance is a linear function of mean. Negative binomial model assumes variance...continue reading.

Overdispersion tests in #rstats

A brief note on overdispersion Assumptions Poisson distribution assume variance is equal to the mean. Quasi-poisson model assumes variance is a linear function of mean. Negative binomial model assumes variance...continue reading.