The data are the numbers of attempts at foraging by 20 adult and 20 immature green-backed herons. The data are listed as grouped (adult or immature) count data i.e. number of herons having a particular count value.
A data frame with 40 observations on the following 2 variables.
a factor with levels
a numeric vector
Zhu J, Eickhoff J, Kaiser M (2003). Modelling the Dependence between Number of Trials and Success Probability in Beta-Binomial-Poisson Mixture Distributions. Biometrics, 59, 955-961. doi: 10.1111/j.0006-341X.2003.00110.x.
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