WhichStats

WhichStats guides you to the right test so you can analyse your data with confidence. Answer simple questions about your study design, variables, and goals, and get a tailored recommendation—with assumptions, what to report, and what to do if assumptions fail.

Guided wizard
Step through a short decision tree: describe your outcome (continuous, binary, count, etc.), number of groups, whether data are paired or independent, and your goal (compare groups, predict, survival, agreement, and more). The app recommends a test and explains why it fits.

Clear, practical recommendations
Each recommendation includes:
• The suggested test
• Key assumptions to check
• What to report (e.g. effect sizes, CIs)
• Suggested plots
• What to do if assumptions are violated

Explore tests
Browse and filter tests by goal and variable type. Tap any test for a summary of typical use, assumptions, reporting tips, and suggested plots.

Glossary
Look up terms (e.g. normal distribution, p-value, confidence interval, logistic regression, survival analysis) with short definitions and real-world examples from lab and clinical research.

Pro
Unlock the full report (what to report, suggested plots, alternatives), decision path, and extra guidance on effect size, post-hoc tests, and multiple testing. Free tier still gives you the recommended test name and assumptions.

Whether you’re running a t-test, ANOVA, regression, or survival analysis, WhichStats helps you choose and report the right test.