Description

The data for this example contains the number of coal miners classified by radiological examination into one of three categories of pneumonoultramicroscopicosilicovolcanoconiosis (known as pneumonoconiosis for short) and by number of years spent working at the coal face divided into eight categories.

Usage

Format

A data frame with 24 observations on the following 3 variables.

Freq

number of miners

status

pneumoconiosis status - a factor with levels mild normal severe

year

number of years service (midpoint of interval)

Source

M. Aitkin and D. Anderson and B. Francis and J. Hinde (1989) "Statistical Modelling in GLIM" Oxford University Press.