Statistics Reference
Browse by topic →Formula sheets, distribution tables, and notation reference for introductory statistics.
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- Nonparametric Tests
Formulas and decision rules for Mann-Whitney U, Wilcoxon signed-rank, Kruskal-Wallis, and Spearman rank correlation: the nonparametric alternatives to common parametric tests.
- Normal Distribution
Standardization, the Central Limit Theorem, and sampling distributions of the mean.
- Post-Hoc Tests
Tukey's HSD, Bonferroni correction, and Scheffé's method for identifying which group pairs differ after a significant ANOVA.
- Probability
Probability rules, counting methods, and discrete distributions including binomial and Poisson.
- Regression and Correlation
Pearson correlation, least-squares regression, inference for regression coefficients, and chi-square tests.
Study guides for choosing and interpreting tests, formula reference sheets organized by topic, distribution tables, and notation reference for introductory statistics.