A waiter recorded all tips earned during a 2.5 month period in early 1990, along with other
information about the customers who gave the tips. The variables are as follows:
obs Observation number of event
totbill The total bill
tip Amount of the tip
sex Sex of tipper (F or M)
smoker Whether the tipper smokes: Yes or No
day Day of the week
time Whether the meal was during the Day or the Night
size Number of people in the dining party
Format
A data frame with 244 rows and 8 variables
Source
Bryant, P. G. and Smith, M. A.(1995), Practical Data Analysis: Case
Found in Interactive and Dynamic Graphics for Data Analysis:
With Examples Using R and GGobi, Dianne Cook and Deborah F. Swayne.
See also http://www.ggobi.org/book/.