Dataset:  piggland.dat

Source: C.B. Davenport and C. Bullard (1896). "Studies in Morphogenesis VI: A
Contribution to the Quantitive Study of Correlated Variation and the
Comparative Variability of the Sexes," Proceedings of the American Academy of
Arts and Sciences, Vol. 32, #4, pp. 87-97

Description: Numbers of glands observed in Right legs and left legs for
2000 male pigs.

Variables/Columns
Right leg glands   7-8
Left leg glands   15-16