pneu {SMPracticals} | R Documentation |
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.
data(pneu)
A data frame with 8 observations on the following 4 variables.
Ashford, J. R. (1959) An approach to the analysis of data for semi-quantal responses in biological assay. Biometrics, 15, 573–581.
Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 509.
data(pneu) summary(glm(cbind(Present+Severe,Normal)~log(Years),data=pneu,binomial)) summary(glm(cbind(Severe,Normal+Present)~log(Years),data=pneu,binomial))