Berkshires.litters: The data are of the number of male piglets born in litters of...

In BinaryEPPM: Mean and Scale-Factor Modeling of Under- And Over-Dispersed Binary Data

The data are of the number of male piglets born in litters of varying sizes for the Berkshire breed of pigs.

Description

The data are arranged as a list of binomial frequency distributions where the listing is by litter size which is included both as a variate (vsize) and as a factor (fsize)

Usage

data("Berkshires.litters")

Format

The format is: List of 3 $ fsize : Factor w/ 7 levels " size 5"," size 6",..: 1 2 3 4 5 6 7 $ vsize : int [1:7] 5 6 7 8 9 10 11 $ number.success:List of 7 ..$ : num [1:6] 8 29 72 65 40 3 ..$ : num [1:7] 5 22 89 129 74 35 4 ..$ : num [1:8] 1 25 62 131 136 89 26 5 ..$ : num [1:9] 1 15 79 179 219 149 71 33 4 ..$ : num [1:10] 2 6 47 117 172 181 117 40 9 2 ..$ : num [1:11] 2 1 23 65 131 145 120 61 20 3 ... ..$ : num [1:12] 0 3 9 22 53 94 72 54 20 4 ...

Source

Brooks, R.J., James, W.H., Gray, E. (1993). Modelling Sub-Binomial Variation in the Frequency of Sex Combinations in Litters of Pigs. Biometrics 47, 403-417.

Examples

data("Berkshires.litters")

BinaryEPPM documentation built on June 22, 2024, 10:30 a.m.