Welch t-Test Calculator
Calculate Welch’s two-sample t statistic and approximate degrees of freedom without assuming equal variances.
Calculate Welch’s two-sample t statistic and approximate degrees of freedom without assuming equal variances.
Move between weighted summaries, t statistics, chi-square goodness-of-fit and one-way ANOVA calculations.
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Open calculatorCalculate Welch’s two-sample t statistic and approximate degrees of freedom without assuming equal variances.
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Open calculatorCalculate Welch’s two-sample t statistic and approximate degrees of freedom without assuming equal variances.
Enter compatible statistical values. The calculator validates the inputs and applies t = (x̄₁−x̄₂) / √(s₁²/n₁ + s₂²/n₂), with Welch-Satterthwaite degrees of freedom.
Variables: x̄₁ = Mean 1; s₁ = Standard deviation 1; n₁ = Sample size 1; x̄₂ = Mean 2; s₂ = Standard deviation 2; n₂ = Sample size 2.
Example: Means 100 and 94 with standard deviations 10 and 12 and sample sizes 25 and 30 give t≈2.0226.
It is an educational tool for descriptive and inferential statistical calculations from supplied values or summary statistics.
No. Where a test statistic is calculated, the tool does not automatically replace study design, assumption checks, p-value interpretation, confidence intervals or subject-matter judgment.
These sources are used to verify terminology, formulas, and information related to this calculator.