10.17 Decreasing trend? A common statistic considered by administration at universities is credit hour production. This is calculated by taking the credit hours for a course taught times the student enrollment. For example, a faculty member teaching two 3-credit courses with 50 students each would have produced 6 × 50 = 300 credit hours. Suppose you are the chair for the department of statistics and you give Figure 10.16 to your dean. The dean asks you to explain the disturbing decreasing trend. How should you respond?