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.
alcAlcohol use. A factor with levels N Y.
cigCigarette use. A factor with levels N Y.
mariMarijuana use. A factor with levels N Y
countCounts for the cross-classification.