Humans are overwhelmingly more likely to be right-handed than left-handed. Among studies of nonhuman primates, Lesley J. Rogers and Gisela Kaplan’s 1995 study of wild orangutans did not report a tendency toward right-handedness, while S.G. Lutz-Maki and P.F. MacNeilage’s 1991 study of captive chimpanzees did. But the latter study involved only 14 individuals, and according to a meta-analysis of primate-handedness studies, from a statistical standpoint, a study needs to examine a population of at least 176 individuals to justifiably claim that the group exhibits handedness at the population level, suggesting that
Desmos Graphing Calculator
Verbal·Information and Ideas·Inferences
easyWhich choice most logically completes the text?
A
the apparent difference between the two studies’ results may be partly attributable to the 1991 study using a different standard to determine handedness than the 1995 study did.
B
any right-handedness exhibited by captive chimpanzees might be an effect of extended contact with humans.
C
the population size in the study that did not report right-handedness in orangutans is too small to justify that conclusion.
D
the population size in the study that reported right-handedness in chimpanzees is too small to justify that conclusion.