The data provided gives the average body weight in kilograms and the average brain weight in grams for sixty-two species of mammals.
This data frame uses species names as row labels and contains the following columns:
Brain weight, grams
Body weight, kg
Allison, T. and Cicchetti, D. (1976). Sleep in mammals: Ecology and constitutional correlates. Science, 194, 732-734.
Weisberg, S. (2005). Applied Linear Regression, 3rd edition. New York: Wiley, Section 7.1.