T-tests & controls

Run Student, Welch, paired or one-sample t-tests locally. Declare control comparisons, adjust for multiplicity and export confidence intervals and figures.

This workspace requires JavaScript. If it does not load, enable JavaScript or reload the page. The methods and analysis guide below remain available without JavaScript.

ABOUT THIS ANALYSIS

T-test calculator: Welch, paired and one-sample tests

Run Student, Welch, paired or one-sample t-tests locally. Declare control comparisons, adjust for multiplicity and export confidence intervals and figures.

When to use it

Independent groups, observations paired by unit ID, or a group compared with a known fixed reference.

What to enter

Import group, unit and value columns with one observation or prespecified summary per experimental unit. Paired designs require complete, matching unit IDs.

What you get

Treatment-minus-reference differences, t statistics, degrees of freedom, raw and adjusted p-values, confidence intervals, paired plots and difference figures.

Assumptions and limits

Choose the design and comparison family before analysis. Bonferroni and Holm adjustments are available; these are not Dunnett’s test. An estimated control mean is not a known fixed reference.

Calculations run locally; participant data stays in browser memory. Download your results or project before leaving. This is beta software, with independent statistical review pending.