If σ₁² = 10 and σ₂² = 5, When Will

Multiple Choice

If σ₁² = 10 and σ₂² = 5, when will the robustness of the assumptions underlying the t-test be in jeopardy? (Consider Type I error only.)

A) When mean₁/mean₂= 2
B) When N₁/N₂= 3
C) When mean₂/mean₁= 2
D) When N₂/N₁= 3