Test whether groups or repeated measurements differ: t tests for two groups or two time points, one-way ANOVA with Tukey HSD and repeated measures ANOVA for three or more.
Independent Samples t Test Calculator
Free independent samples t test calculator. Paste two groups from Excel and get Levene's test, Student and Welch t, 95% CI, Cohen's d and an APA write-up.
Paired Samples t Test Calculator
Free paired t test calculator for pre-test/post-test data. Get mean difference, 95% CI, t, p, Cohen's d_z, step-by-step working and an APA 7 sentence.
One-Way ANOVA Calculator with Tukey HSD
Free one-way ANOVA calculator with Tukey HSD post hoc test. Paste groups from Excel and get the ANOVA table, eta squared and an APA 7 write-up.
Repeated Measures ANOVA Calculator
Free repeated measures ANOVA calculator with Mauchly's test, Greenhouse-Geisser and Huynh-Feldt corrections, Bonferroni pairwise tests and APA 7 output.
Which one do I need?
- Independent Samples t Test Calculator: The independent samples t test compares the means of two separate groups, for example male and female students’ exam anxiety scores.
- Paired Samples t Test Calculator: The paired samples t test (also called the dependent or repeated-measures t test) compares two measurements taken from the same participants, such as pre-test and post-test scores after a training programme.
- One-Way ANOVA Calculator with Tukey HSD: One-way ANOVA tests whether the means of three or more independent groups differ, for example exam scores under three teaching methods.
- Repeated Measures ANOVA Calculator: A one-way repeated measures ANOVA compares three or more measurements taken from the same participants, for example anxiety scores at Week 1, Week 2, Week 3 and Week 4 of a programme.