tonsil: Data Set of Tonsil Size in Children

In Fahrmeir: Data from the Book "Multivariate Statistical Modelling Based on Generalized Linear Models", First Edition, by Ludwig Fahrmeir and Gerhard Tutz

Description

Children have been classified according to their relative tonsil size and wheater or not they are carriers of Streptococcus pyogenes.

Usage

data(tonsil)

Format

A data frame with 6 observations on the following 3 variables.

Streptococcus.p

a factor with levels carriers noncarriers

Size

numeric, 1, 2 or 3, tonsil size

n

number of children in group

Details

It may be assumed that tonsil size always starts in the normal state "present but not enlarged" (category 1). If the tonsils grow abnormally, they may become "enlarged" (category 2), if the process does not stop, they may become "greatly enlarged" (category 3).

Source

Ludwig Fahrmeir, Gerhard Tutz (1994): Multivariate Statistical Modelling Based on Generalized Linear Models. Springer Series in Statistics. Springer Verlag. New-York Berlin Heidelberg

Examples

str(tonsil)
summary(tonsil)

Fahrmeir documentation built on May 2, 2019, 12:37 p.m.