StatLab — free statistics software in your browser

StatLab lets you enter or import data (CSV, Excel, SPSS .sav), label your variables, and run common statistical tests — t tests, ANOVA, chi-square, correlation, regression, reliability and nonparametric tests — with SPSS-style tables and an APA-style summary. Everything is computed on your device.

Start with File → Sample dataset, then choose a procedure from Analyze. New here? Read the user guide, try a worked example, or see all features. Free for students and researchers.

Accuracy: 433 reference test cases, 36,554 values checked against scipy/statsmodels/numpy, 0 failures (report).