tips: Tips received by a waiter over a several-month period at a restaurant
ozone: Daily measurements of ozone concentration and other weather variables in New York during the summer of 1973
islands: Numbers of reptile and amphibian species and island areas for seven islands in the West Indies.
statin: Blood pressure and statin usage in Pennsylvania health care practices (simulated)
handspeed: Hand speed (time required to complete a task of manual dexterity) among subjects of various ages
education: Per capita education expenditure for the 50 United States in 1975
donner: Survival, age, and sex of the members of the ill-fated Donner party
challenger: Temperature and O-ring failures for all the pre-Challenger Space Shuttle flights
dystrophy: Case-control study of the relationship between Duchenne Muscular Dystrophy and two serum enzymes
wcgs: Data from the Western Collaborative Group Study of risk factors for coronary heart disease in males
wells: Arsenic contamination and well-switching in Bangladesh
aids: New cases of AIDS in Belgium, 1981-1993
britdoc: Data from Richard Doll's classic 1951 study of smoking and heart disease mortality in British male doctors
abomb: Cancer deaths and exposure to radiation in Japan among survivors of the atomic bombs
flu-vaccine: Data from a randomized controlled trial of an influenza vaccine
frisk: Stops by the New York City police department, by crime, ethnic group, and precinct, 1998-1999.
gator: Primary food choice of alligators captured from four Florida lakes
martin: Trust in local government following the 2001 Martin County coal slurry spill