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Exercises for Comparison of Means

Using the teaching ratings data, answer the following questions:

  1. Determine the mean and standard deviation for course evaluations for minority and non-minority instructors. Determine whether the instructors belonging to minority groups are more or less likely to obtain a course evaluation of 4.1 or higher.
  2. Determine the mean and standard deviation for course evaluations for upper- and lower-level courses. Determine whether the probability of obtaining a below-average course evaluation is higher for lower-level courses. Use 3.999 as the average course evaluation.
  3. Determine whether tenured professors receive above-average course evaluations.
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