GPAs A university’s data about incoming high school graduates indicates that the mean of their high school averages was 73, with a standard deviation of 7; the distribution was roughly mound-shaped and only slightly skewed. The students are randomly assigned to firstyear writing seminars in groups of 25.

What might the mean high school average of one of these seminar groups be? Describe the appropriate sampling distribution model—shape, centre, and spread—with attention to assumptions and conditions. Make a sketch using the 68–95–99.7 Rule.