Dataset:  cranium.dat

Source: G.P. Rightmire (1986). "Stasis in Homo erectus Defended",
Paleobiology, Vol. 12, #3 pp.324-325.

Description: Cranial Capacities among 3 groups of Homo erectus
1=Lower Pleistocene
2=Early Middle Pleistocene
3=Late Middle Pleistocene

Variables/Columns
Group   1
Sample Size    4
Mean    7-10
Std. Dev.   13-18