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Poisson two-way ANOVA test for Before and After treatment (including a control)

Generalized Linear Mixed Model What you are describing is called nesting: You have multiple physical locations sampled within each site, let's call those subsites. Those subsites themselves have ...
Frans Rodenburg's user avatar
7 votes

Standard negative binomial regression when counts are mainly zeros?

To choose between a regular and zero-inflated count model, consider that a large proportion of zeros can happen for several reasons: Average counts are low. For example, with an average rate of $\...
Frans Rodenburg's user avatar
9 votes

Standard negative binomial regression when counts are mainly zeros?

I don't quite think that a distinction between "true" and "untrue" ("false"?) zeros is very helpful. Zero inflated distributions arise naturally if your data generating ...
Stephan Kolassa's user avatar
4 votes

When to choose GAM over GLMM and how to include random effect into GAM

Answer to OP's Original Question This part of the question originally addressed OP's question about overdispersion and conventional residual plots from separate count models. See edit to see response ...
Shawn Hemelstrand's user avatar
4 votes
Accepted

Can I include a variable related to the outcome variable into statistical analysis?

The Problem My interpretation of the problem is that you want to know how the difference in the number of contacts depends on the demographic variables you listed. What you have tried now is to take ...
Frans Rodenburg's user avatar
0 votes

Linear models to compare SNP categories between patients

Take a simple example with your sample size: a binary marker that is positive for all 3 "healthy" and negative for all 5 "disease," perfect alignment with ...
EdM's user avatar
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