Resources · Research tool

Statistics, step by step

Not sure which statistical test to use, or what the result means? Answer a few plain questions to find your test, then try it with example numbers or your own. Every result starts with a short answer in plain English, then walks you through the details. Tap any underlined term for a quick explanation.

1

Find your test

Pick the answers that fit your study. No statistics knowledge needed.

2

Work through a test

Choose a test, then use the example or switch to your own numbers. Everything is calculated in your browser; nothing is sent anywhere.

Calculations follow standard formulas and were checked against SciPy, a widely used statistics library. Effect size benchmarks come from Cohen (1988) and, for second language research, Plonsky and Oswald (2014, Language Learning). This tool is for learning; for a thesis or article, run your final analysis in software such as jamovi, JASP, R, or SPSS and check the assumptions there. Spotted an error? Let me know through the contact page.