Welch t Test for Two Samples
Compare means for two independent samples without assuming equal variances.
Your numbers
t test statistic value
For samples wey independent. Paired measurements need paired test.
Compare scenarios
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Formula
Use t = (m₁−m₂)/√(s₁²/n₁+s₂²/n₂). m, s and n na each sample mean, sample standard deviation and size; subscripts dey distinguish di samples. Di two-sided p-value dey use Welch–Satterthwaite degrees of freedom, without assuming equal variances.
Compare means for two independent samples without assuming equal variances.
Example wey show the calculation
- Values for sample A
- 8, 9, 10, 11, 12
- Values for sample B
- 6, 7, 8, 9, 10
- t test statistic value
- 2
- Degrees of freedom for Welch test
- 8
- Two-sided p-value
- 0.0805162379573
Where e fit work and limits
For samples wey independent. Paired measurements need paired test.
We check inputs for missing values and allowed ranges. Result wey pass the finite numeric range no go show. Rounding affect wetin display, while calculation use the model numeric precision.
Check your units and assumptions before you rely on result. Changing label no convert currency or physical unit.
Version of di formula: b9e7c9f50fc1 · Example don get check: