2-Sample Poisson Rate (Minitab): exact conditional test — given the total, X₁ ~ Binomial(X₁+X₂, t₁/(t₁+t₂)) under H0 — or the normal approximation with pooled rate; CI for λ₁ − λ₂ is normal (unpooled).
Optional
2-Sample Poisson Rate (Minitab): exact conditional test — given the total, X₁ ~ Binomial(X₁+X₂, t₁/(t₁+t₂)) under H0 — or the normal approximation with pooled rate; CI for λ₁ − λ₂ is normal (unpooled).