mammals
data frame has 62 rows and 2 columns.The data give average brain weight and average body weight for 62 different species of land mammals. Each row in the data frame is named with the name of the species whose measurements are in the row.
data(mammals)
Weisberg, S. (1985) Applied Linear Regression (Second edition). John Wiley.
Venables, W.N. and Ripley, B.D. (1994) Modern Applied Statistics with S-Plus. Springer-Verlag.