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# Administrators at International University are curious how students' GPAs after their first year compare to their high school GPAs. They plan on taking an

## Administrators at International University are curious how students' GPAs after their first year compare to their high school GPAs. They plan on taking an SRS of 80 of the 900 freshmen to look up their high school GPAs. They plan to look at the difference between the mean high school and the mean university GPA for students in the sample (HS - Uni) at the end of their first year. Consider the formula: 021-22 = + Why is it not appropriate to use this formula for the standard deviation of HS - Uni?

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