Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
A normality check requiring that n₁p̂₁, n₁(1-p̂₁), n₂p̂₂, and n₂(1-p̂₂) are all at least 5 or 10 to ensure the sampling distribution is approximately normal.
AP course connection
Topic 6.8: 6.8 Confidence Intervals for the Difference of Two Proportions