T-tests and ANOVA
Independent Samples T-Test: How to Run, Interpret and Report It
Everything you need to compare two group means, from assumptions and Levene's test to Welch's correction, Cohen's d and an APA-ready write-up.
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T-tests and ANOVA
Step-by-step guides to t-tests, ANOVA and post hoc tests: assumptions, effect sizes, interpretation and APA reporting, with free online calculators.
T-tests and ANOVA
One-Way ANOVA Explained: Assumptions, Post Hoc Tests and APA Reporting
Compare three or more group means the right way, with a worked example covering the F-test, Welch's F, Tukey post hoc comparisons, effect sizes and APA reporting.
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ANCOVA CalculatorFree one-way ANCOVA calculator: Type III tests, adjusted (estimated marginal) means, partial eta squared and the homogeneity of regression slopes test.Independent Samples T-Test CalculatorFree two-sample t-test calculator with Student and Welch results, Levene’s test, 95% CI, Cohen’s d and Hedges’ g. Paste data from Excel.MANOVA CalculatorFree one-way MANOVA calculator with Pillai’s trace, Wilks’ lambda, Hotelling’s trace, Roy’s root, partial eta squared and follow-up ANOVAs.One-Sample T-Test CalculatorFree one-sample t-test calculator: compare a sample mean with a test value and get t, df, p, the 95% CI and Cohen’s d in an APA table.One-Way ANOVA CalculatorFree one-way ANOVA calculator with Levene’s test, Welch’s F, eta squared, omega squared and Tukey HSD post-hoc comparisons. APA tables in seconds.Paired Samples T-Test CalculatorFree paired t-test calculator for pre-post and matched data: mean difference, t, df, p, 95% CI and Cohen’s dz in an APA-formatted table.Repeated Measures ANOVA CalculatorFree within-subjects repeated measures ANOVA with Mauchly’s test of sphericity, Greenhouse-Geisser and Huynh-Feldt corrections and Bonferroni post-hoc.Two-Way ANOVA CalculatorFree factorial two-way ANOVA calculator with Type III sums of squares, partial eta squared, cell means and an interaction plot. Matches SPSS.