Breslow and Day (1980) studied the effect of age, tobacco, and alcohol on esophageal cancer rates at Ile-et-Vilaine, France. Data are altered slightly to make the design balanced, and to allow enough degrees of freedom to perform a fully factorial three way ANOVA.
data(e.cancer)
The dataset contains four variables:
age group, a factor with four levels: "25-34", "35-44", "45-54", "55-64"
, and "65-74"
.
alcohol consumed (g/day).
tobacco consumed (g/day).
number of esophageal cancer cases.