One Proportion Z-Test Calculator
Test if a sample proportion differs from a hypothesized population proportion
About One Proportion Z-Test
Formula: z = (pΜ - pβ) / β(pβ(1-pβ)/n)
Assumptions:
- Random sample
- npβ β₯ 10 and n(1-pβ) β₯ 10
- Independence of observations
Wilson CI is recommended over Wald CI for better coverage.
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