t-test Calculator

One-sample • Two-sample • Paired • p-value + CI • Ajax loading • Hard reset

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Settings

🧪 Test type

CI %

CI uses the same df as the selected test. Default: 95%.

🎯 One-sample hypothesis

μ₀

Tests whether the sample mean differs from μ₀.

Quick summary

Enter data to compute the t-test.

⚖️ Two-sample assumption Assume equal variances (pooled)

Unchecked = Welch’s t-test (recommended).

Quick summary

Enter data for both groups.

🔗 Paired test

Uses differences (A − B) and runs a one-sample t-test on them with μ₀ = 0.

Quick summary

Enter paired data (same length).

Data

📌 Sample / Group A

Tip: paste from Excel/Sheets; newlines are fine.

Results

t statistic

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Degrees of freedom (df)

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p-value

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Effect (mean diff)

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n (A / B)

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Action

Hard reset: cancels pending updates and clears everything on the first click.

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