herons.group {CountsEPPM}

Green-backed herons as two groups

Description

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.

Usage

data(herons.group)

Format

The format is: List of 2 $ group : Factor w/ 2 levels " Adult"," Immature": 1 2 $ number.attempts:List of 2 ..$ : num [1:25] 0 5 2 1 1 1 0 2 0 1 ... ..$ : num [1:26] 0 2 2 1 5 1 2 2 1 1 ...

Source

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.

Examples

data(herons.group)
print(herons.group)