Two Proportion Z-Test Calculator
Test if two population proportions are significantly different
About Two Proportion Z-Test
Formula: z = (p̂₁ - p̂₂) / √(p̂(1-p̂)(1/n₁ + 1/n₂))
Assumptions:
- Independent random samples
- n₁p̂₁, n₁(1-p̂₁), n₂p̂₂, n₂(1-p̂₂) all ≥ 5
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.