Question: The head of the anthropology department at a local college has three candidates in his department for an excellence in teaching award, and he wants to select the candidate with the best teaching skills. Each candidate currently teaches a section of Anthropology 101. The department head develops an evaluation form and asks five students from each of the three sections to rate their current instructor on a scale of 1-30 for such qualities as command of the material, ability to explain difficult concepts, and availability to students outside of class. The ratings are as follows:

Compare Instructors A and C and Instructors B and C.