One-Mean Z-Test Calculator

Z statistic, CV method, p-value, confidence interval, power helper — standalone widget (iframe-ready).

🌙 Export CSV

Sample mean (x̄)

Hypothesized mean (μ₀)

Population σ

Sample size (n)

α (significance)

Test type Two-sided (μ ≠ μ₀)Right-sided (μ > μ₀)Left-sided (μ < μ₀)

⚡ Calculate Live Plot range

Advanced options ▾

Confidence level (CI) 90%95%99%

Effect size δ (μ₁ − μ₀)

Cohen's d (optional)

Target power %

Hover the curve to see density; shaded areas are rejection regions.

Click Calculate (or enable Live) to view results.

Decision

Print PDF

Standalone HTML — ready to upload and embed with an iframe.

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