69 Cheek teeth of extinct primates. The American Journal of Physical Anthropology (Vol. 142, 2010) did a study of the characteristics of cheek teeth (e.g., molars) in an extinct primate species. Recall that the researchers recorded the dentary depth of molars (in millimeters) for a sample of 18 cheek teeth extracted from skulls. These depth measurements, saved in the CHEEKTEETH file, are listed in the accompanying table. Anthropologists know that the mean dentary depth of molars in an extinct primate species—

called Species A—is 15 millimeters. Is there evidence to indicate that the sample of 18 cheek teeth come from some other extinct primate species (i.e., some species other than Species A)? Use the SPSS printout (next page) to answer the question.

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18.12 19.48 16.55 15.70 19.36 17.83 15.94 13.25 15.83 16.12 19.70 18.13 15.76 14.02 17.00 14.04 13.96 16.20 Based on Boyer, D. M., Evans, A. R., and Jernvall, J. "Evidence of dietary differentiation among Late Paleocene-Early Eocene Plesiadapids (Mammalia, Primates)." American Journal of Physical Anthropology, Vol. 142, 2010.