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.
Model comparison information’s with relative rankings.
| Model | −2 LL | AIC | Pearson Chi-Square | Ranking |
|---|---|---|---|---|
| Poisson | 4907.6 | 8732.6 | 8566.8 | 5 |
| Negative Binomial | 4270.8 | 1467.6 | 536.4 | 3 |
| Poisson Hurdle | 5115.7 | 5157.7 | 1320.2 | 4 |
| ZINB | 1432.4 | 1472.4 | 465.7 | 2 |
| ZIP | 6303.1 | 5961.7 | 2200.8 | 6 |
| Negative Binomial Hurdle | 1408.8 | 1448.8 | 343.7 | 1 |
LL: Log-likelihood; AIC: Akaike information criterion.
