Cheek teeth of extinct primates. The characteristics of cheek teeth (e.g., molars) can provide anthropologists with...

Cheek teeth of extinct primates. The characteristics of cheek teeth (e.g., molars) can provide anthropologists with information on the dietary habits of extinct mammals. The cheek teeth of an extinct primate species were the subject of research reported in the American Journal of Physical Anthropology (Vol. 142, 2010). A total of 18 cheek teeth extracted from skulls discovered in western Wyoming were analyzed. Researchers recorded the dentary depth of molars (in millimeters) for a sample of 18 cheek teeth extracted from skulls. These depth measurements 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)?

The data are given below (you will need to put it into a single column). You will need to calculate the sample statistics. This is a small sample problem - use t.

18.12	16.55
19.48	15.7
19.36	17.83
15.94	13.25
15.83	16.12
19.7	18.13
15.76	14.02
17	14.04
13.96	16.2

Construct 95% Confidence interval using t value. What is the upper bound of CI?
Construct 95% Confidence interval using t value. What is the lower bound of CI?
Calculate the value of the test statistic.

Expert Solution

Test statistics = 3.252

95% CI is (15.535, 17.485)

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