SMPracticals (version 1.3-1)

pneu: Pneumoconiosis amongst Coalminers

Description

This gives the degree of pneumoconiosis (normal, present, or severe) in a group of coalminers as a function of the number of years worked at the coalface. The degree of the disease was assessed radiologically and is qualitative.

Usage

data(pneu)

source

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

References

Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 509.

Examples

data(pneu)
summary(glm(cbind(Present+Severe,Normal)~log(Years),data=pneu,binomial))
summary(glm(cbind(Severe,Normal+Present)~log(Years),data=pneu,binomial))