Twenty-five students from Harry High School were accepted at
Magic University. Of those students, 10 were offered athletic
scholarships and 15 were not. Mrs. Hermione believes Magic
University may be accepting people with lower ACT scores if they
are athletes. The newly accepted student ACT scores are shown
here.
Athletic scholarship: 16, 24, 20, 25, 24, 23, 21, 22, 20, 20
No athletic scholarship: 23, 25, 26, 30, 32, 26, 28, 29, 26, 27,
29, 27, 22, 24, 25
Part A: Do these data provide convincing evidence
of a difference in ACT scores between athletes and nonathletes?
Carry out an appropriate test at the α = 0.10 significance level.
(5 points)
Part B: Create and interpret a 90% confidence
interval for the difference in ACT scores between athletes and
nonathletes. (5 points)
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