T-Test and ANOVA Calculators
Compare group means with the parametric tests used in most theses and journal articles. Use a t-test for two groups, ANOVA for three or more, repeated measures ANOVA for the same people measured several times, ANCOVA to adjust for a covariate, and MANOVA for several outcomes.
One-Sample T-Test Calculator
Test whether a sample mean differs from a known or hypothesized value.
Replaces SPSSIndependent Samples T-Test Calculator
Compare the means of two independent groups, with Levene’s test, Welch correction and Cohen’s d.
Replaces SPSS · PrismPaired Samples T-Test Calculator
Compare two related measurements, such as before and after scores from the same people.
Replaces SPSS · PrismOne-Way ANOVA Calculator
Compare three or more group means, with Levene’s test, Welch’s F and Tukey HSD post-hoc tests.
Replaces SPSS · Prism · MinitabTwo-Way ANOVA Calculator
Main effects and the interaction of two factors, with Type III sums of squares and partial eta squared.
Replaces SPSS GLM · PrismRepeated Measures ANOVA Calculator
Compare three or more measurements from the same subjects, with Mauchly’s test and Greenhouse-Geisser correction.
Replaces SPSS GLM RepeatedANCOVA Calculator
Compare group means while controlling for covariates, with adjusted means and a homogeneity-of-slopes check.
Replaces SPSS GLMMANOVA Calculator
Compare groups on several dependent variables at once with Pillai’s trace, Wilks’ lambda and follow-up ANOVAs.
Replaces SPSS GLM MultivariateOne-Sample T-Test Calculator
Use it to test whether a sample mean differs from a specific number, such as the midpoint 3 of a five-point scale.
Independent Samples T-Test Calculator
Use it when one continuous outcome is measured in two separate groups, such as treatment and control.
Paired Samples T-Test Calculator
Use it when the same participants are measured twice, or when cases are matched in pairs.
One-Way ANOVA Calculator
Use it to compare one continuous outcome across three or more independent groups.
Two-Way ANOVA Calculator
Use it when two categorical factors may each affect an outcome, and you want to know whether their effects combine or interact.
Repeated Measures ANOVA Calculator
Use it for three or more measurements of the same outcome on the same subjects, such as scores at weeks 0, 4, 8 and 12.
ANCOVA Calculator
Use ANCOVA to compare groups while adjusting for a continuous variable that also affects the outcome, most often a baseline or pre-test score.
MANOVA Calculator
Use MANOVA when you have two or more related continuous outcomes and want to test group differences on them together, controlling the overall error rate.
Other categories
Data cleaning and preparation · Describe and explore · Nonparametric tests · Correlation and regression · Bayesian statistics · Categorical data · Reliability and agreement · Multivariate analysis · Structural equation modeling · Econometrics and time series · Panel data and causal inference · Marketing and decision research · Survival, clinical and meta-analysis · Study planning and calculators · PLS-SEM