Overdispersion occurs when observed conditional variation exceeds that prescribed by a statistical model. For count data it commonly means variance greater than the mean assumed by a Poisson model.
Ancestors (9)
- Dispersion parameter
- Exponential dispersion model
- Exponential family
- Statistical modelling
- Statistical model
- Probability and statistics
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- Deviance goodness-of-fit test
- Logistic-normal regression with autoregressive random effects
- Negative binomial distribution
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- Poisson-lognormal random-effect model
- Poisson mean saturation at three distinct times
- Poisson mixture
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