10 Services from stats-tests.x402tookit.com

Adjusts a list of raw p-values for multiple testing using Bonferroni, Sidak, Holm, and Benjamini-Hochberg methods and reports which hypotheses survive each correction.

Performs one-way ANOVA across 2–12 groups, returning F statistic, degrees of freedom, p-value, eta squared, omega squared, and group means.

Performs an exact binomial test for k successes in n trials against a hypothesised probability, returning two-sided and one-sided p-values plus the Clopper-Pearson confidence interval.

Runs a chi-square goodness-of-fit test on observed vs expected counts, or a chi-square independence test on a contingency table, returning the test statistic, p-value, degrees of freedom, and effect size.

Computes odds ratio, relative risk, risk difference, and number needed to treat with confidence intervals from a 2×2 contingency table of exposed/unexposed event counts.

Computes two-sided and one-sided p-values via the hypergeometric distribution and the sample odds ratio for a 2×2 contingency table using Fisher's exact test.

Performs the Mann-Whitney U test on two independent samples, returning U statistics, exact or approximate p-values, and rank-biserial effect size.

Screens a numeric sample for normality using skewness, excess kurtosis, Jarque-Bera test with p-value, and the 68-95-99.7 rule check.

Runs a paired t-test on before/after measurements from the same subjects, returning mean change, t-statistic, degrees of freedom, p-value, confidence interval, and Cohen's dz effect size.

Calculates the required sample size for a t-test given effect size, alpha, and power — or returns the achieved power for a given sample size.