Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Plots of the PSR (first column), deviance (middle column), and Pearson (last column) residuals versus Z for 2000 data points generated under A) a Poisson model and analyzed with a Poisson model, B) a negative binomial model and analyzed with a negative binomial model, and C) a negative binomial model and analyzed with a Poisson model. Smoothed curves using Friedman’s ‘super smoother’ are added.
