basic

Z-Test One-Proportion Significance Calculator

z = (p̂ − p0) / √(p0(1−p0)/n) — one-sample proportion test.

Calculates the z-statistic for a one-sample proportion test comparing an observed sample proportion against a known or hypothesised proportion.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

z = (p_hat − p0) / √(p0(1−p0)/n)

In depth

Calculates the z-statistic for a one-sample proportion test comparing an observed sample proportion against a known or hypothesised proportion.