A cross-tabulation of whether a student smokes and how many of his or her parents smoke from a study conducted in the 1960's.
A data frame with 5375 observations on the following 2 variables.
Student a factor with levels
Parents a factor with levels
S. V. Zagona (ed.), Studies and issues in smoking behavior, University of Arizona Press, 1967.
The data also appear in
Brigitte Baldi and David S. Moore, The Practice of Statistics in the Life Sciences, Freeman, 2009.