miners: Pneumoconiosis in coal miners

In SMIR: Companion to Statistical Modelling in R

Description

The file gives the numbers of coalminers classified by radiological examination into one of three categories of pneumoconiosis, normal, mild pneumoconiosis and severe pneumoconiosis, and by years spent working at the coalface (interval midpoint).

Usage

data(miners)

Format

A data.frame of 8 obs. of 4 variables:

[,1]	years	numeric, years (midpoint) of years spent at coalface
[,2]	n	integer, number of miners classified as normal
[,3]	m	integer, number of miners with mild pneumoconiosis
[,4]	s	integer, number of miners with severe pneumoconiosis

Note

See p.279 in SMIR

Source

Ashford, J. R. (1959), "An approach to the analysis of data from semi-quantal responses in biological response", Biometrics, 15,573–581.

SMIR documentation built on May 29, 2017, 10:39 a.m.