From the time of early studies by Sir Francis Galton in the late
nineteenth century linking it with mental ability, the cranial
capacity of the human skull has played an important role in
arguments about IQ, racial differences, and evolution, sometimes
with serious consequences. (See, for example, S.J. Gould, "The
Mismeasure of Man," .) Suppose that the mean cranial capacity
measurement for modern, adult males is cc (cubic centimeters) and
that the standard deviation is cc. Complete the following
statements...