---- Daten von Di Cook's "Xgobi Book" page http://www.public.iastate.edu/~dicook/xgobi-book/ (Martin Maechler, Nov.16, 2001) -------------------------------------------------------------------------------- In one restaurant, a foodserver recorded the following data on all customers he had served during an interval of two and a half months in early 1990. The restaurant, located in a suburban shopping mall, was one of a national chain and served a varied menu. TOTBILL Total bill, including tax, in dollars TIP Tip in dollars SEX Sex of person paying the bill (0=male, 1=female) SMOKER Smoker in the party? (0=no, 1=yes) DAY 3=Thursday, 4=Friday, 5=Saturday, 6=Sunday TIME 0=day, 1=night SIZE Size of the party