# brainhead.csv
#
# From: http://www.stat.ufl.edu/~winner/data/brainhead.txt
# Original source: Gladstone, R.J. 1905. A Study of the Relations of the Brain
#   to the Size of the Head. Biometrika 4:105-123.
#
# head.size: Head volume in cubic centimeters
# brain.weight: Brain weight in grams
# gender: Gender (male or female)
# age.group: Age group (20-46 years or 46+ years)