Agresti (2012) included a three way contingency table describing cigarette, alcohol, and marijuana use of high school students in Dayton Ohio.
data(drugs)
A data frame with 8 observations on the following 4 variables.
alc
Alcohol use. A factor with levels N
Y
.
cig
Cigarette use. A factor with levels N
Y
.
mari
Marijuana use. A factor with levels N
Y
count
Counts for the cross-classification.