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44 views

Conflicting residual diagnostics for GLMM for binary data: zero-inflation

I fitted a mixed logit model with crossed random effects in lme4_1.1-21::glmer to some experimental binary data. The maximal random-effect structure justified by ...
1
vote
1answer
96 views

Residuals still zero inflated after running zero-inflated poisson mixed effect model with glmmTMB

I am working with observational data which has a right skew in the dependent variable. This is a mixed effect model with a poisson distribution as based on discrete data. After finding the residuals ...
1
vote
1answer
800 views

Residuals in Zero-Inflated Negative Binomial Regression

What do residuals mean in the context of zero-inflated negative binomial regression? I'm learning zero-inflated negative binomial regression. The data is from a state education system and includes ...
1
vote
1answer
450 views

Unusual residual plot of mixed effects model fitted with lme in R (zero-inflated DV?)

I ran a mixed effect model in R by using lme() to analyze the following data (an excerpt is shown in the following): ...
2
votes
1answer
60 views

Chosing the right test for weekly disease counts

I am using STATA to analyze count data (weekly disease counts), and I am trying to pick the best test between Poisson, negative binomial and zero-inflated Poisson / negative binomial but I am not sure ...
0
votes
1answer
2k views

How to improve the fit of a zero-inflated, negative binomial glmmADMB model

I have been trying to fit count data that is zero-inflated and overdispersed using generalized linear mixed models. My research led me to the glmmadmb function in ...
88
votes
4answers
36k views

Diagnostic plots for count regression

What diagnostic plots (and perhaps formal tests) do you find most informative for regressions where the outcome is a count variable? I'm especially interested in Poisson and negative binomial models, ...