herons.case: Green-backed herons as two groups

In CountsEPPM: Mean and Variance Modeling of Count Data

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.case")

Format

A data frame with 40 observations on the following 2 variables.

group

a factor with levels Adult Immature

number.attempts

a numeric vector

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. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1111/j.0006-341X.2003.00110.x")}.

Examples

data(herons.case)
print(herons.case)

CountsEPPM documentation built on May 29, 2024, 11:54 a.m.