A browser-based teaching tool that runs 14 of the most common hypothesis tests — for means, proportions, variances, ANOVA, $\chi^{2}$, and non-parametric problems — with step-by-step formulas, shaded rejection regions, and automatic assumption checks. Sister application to StatTables, designed to replace the test-by-test recipes traditionally given in the appendix of an introductory statistics textbook.
