An Experiment Will Be Conducted to Compare the Effectiveness of a New

Multiple Choice

An experiment will be conducted to compare the effectiveness of a new treatment against a placebo. Which of the following combinations would lead to a test with the highest power?

A) n₁ = 40, n₂ = 45 and $\mu$ ₁ - $\mu$ ₂ = 10
B) n₁ = 40, n₂ = 45 and $\mu$ ₁- $\mu$ ₂ = 20
C) n₁ = 70, n₂ = 80 and $\mu$ ₁- $\mu$ ₂ = 10
D) n₁ = 70, n₂ = 80 and $\mu$ ₁ - $\mu$ ₂ = 20