Footrot counts on lambs

Description

Counts of two foot shape classes on 2513 lambs. The feet of 2513 lambs born in 1980 and 1981 from 5 mating groups were scored in two foot shape classes: 1) all four feet are normal, and 2) one foot is deformed. Two indicator variables were also recorded for the presence of the disease conditions scald and rot. The data are grouped into 68 sex, sire and mating group combinations.

Usage

lamb

Format

A data frame with 12 columns and 68 rows:

• cyr: Cross year, an integer with values 1 and 2

• Grp: Group, factor with 5 levels

• Sex: Sex, factor with 2 levels

• Sire: Sire number, factor with 18 levels

• xxx: A numeric vector

• tot: Binomial totals for each sex-sire-group combination

• l5: Incidence of foot shape class 2 (count)

• l4: Incidence of foot shape class 1 (count)

• ls: Incidence of scald disease (count)

• lr: Incidence of rot disease (count)

• prop: Foot shape class 2 (l5) as a proportion

• fail: Foot shape class 2 failure counts (1-l5)