Overdispersion & Negative Binomial Regression – Practice Quiz

Investigate count variation beyond a Poisson model. Work through Pearson dispersion, hidden rate heterogeneity, Gamma-Poisson mixtures, negative-binomial variance and zero-inflated models. Prerequisites: Poisson regression, conditional expectation and variance, likelihood and GLMs. Challenges distinguish modeling mean structure, dispersion, dependence and structural zeros rather than choosing models from one pooled statistic.

Further reading: NB reference, GLM family reference, ZIP reference.