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 1069 cc (cubic centimeters) and that the standard deviation is 269 cc. complete the following statements about the distribution of cranial capacity measurements for modern, adult males.(a) according to chebyshev's theorem, at least ? of the measurements lie between 531 cc and 1607 .(b) according to chebyshev's theorem, at least ? of the measurements lie between 665.5 cc and 1472.5 .(c) suppose that the distribution is bell-shaped. according to the empirical rule, approximately ? of the measurements lie between 531 cc and 1607 .(d) suppose that the distribution is bell-shaped. according to the empirical rule, approximately 68% of the measurements lie between ? and ?