A Study Compared the Average Number of Courses Taken by a Random

Multiple Choice

A study compared the average number of courses taken by a random sample of freshmen at a university with the average number of courses taken by a separate random sample of freshmen at a community college. Which of the following combinations would lead to a test with the highest power?

A) n₁ = 50, n₂ = 100 and $\mu$ ₁ - $\mu$ ₂ = 1.2
B) n₁ = 70, n₂ = 120 and $\mu$ ₁ - $\mu$ ₂ = 1.2
C) n₁ = 50, n₂ = 100 and $\mu$ ₁- $\mu$ ₂ = 0.8
D) n₁ = 70, n₂ = 120 and $\mu$ ₁ - $\mu$ ₂ = 0.8