Two-Sample T-Test Calculator
Calculate Welch's or pooled two-sample t statistic for independent samples.
Description
Calculate Welch's or pooled two-sample t-test statistic.
Two-Sample T-Test Calculator is a focused tool for the following task. Calculate Welch's or pooled two-sample t-test statistic. It reports T statistic from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Two-Sample T-Test
Use this calculation to reproduce a defined quantitative method when the observations, units, sampling process, and assumptions match the method shown here.
- First sample
- Required list.
- Second sample
- Required list.
- Assume equal variance
- Optional boolean.
The cited overview of Statistics supplies background for the terminology and domain context used by this tool.1
How Two-Sample T-Test works
Calculate Welch's or pooled two-sample t-test statistic. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- T statistic
- Returned number.
Limitations and assumptions
- A numerical result does not by itself establish data quality, causation, representativeness, independence, distributional fit, or practical significance.
- Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.
Alternative or Complementary approaches
Inspect the underlying data, visualize its distribution, report uncertainty and sample size, and compare the result with a robust or domain-specific method where appropriate.
References
-
Statistics — Wikipedia contributors
Similar or alternative tools
- Mann-Whitney U Test Calculator
Calculate the Mann-Whitney U statistic for two independent samples using average ranks for ties.
- Permutation Test Calculator
Exact two-sided permutation test on the difference of two group means; all C(nA+nB, nA) group assignments of the pooled sample (each sample capped at 8 values) are enumerated deterministically.
- Pooled Standard Deviation Calculator
Calculate pooled sample standard deviation from two sample variances and sizes.