bronch {MCPAN} | R Documentation |
Data of a long term rodent carcinogenicity study of bronchial carcinoma.
data(bronch)
A data frame with 200 observations on the following 3 variables.
group
0
1
2
3
, labelling the control and the three dose groupsY
time
Not yet checked for consistency with the source!
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data(bronch) # raw tumour counts: table(bronch[c("group","Y")]) # groupwise times of death: boxplot(time ~ group, data=bronch, horizontal=TRUE)