ANOVA One Way Calculator
Run one-way ANOVA summary statistics for multiple groups.
One-Way ANOVA Calculator compares means across three or more groups to test whether at least one group mean differs from the others. ANOVA separates total variation into between-group variation, which reflects differences among group averages, and within-group variation, which reflects scatter inside each group. The F-statistic is the ratio of these two variance estimates; a large F value suggests group means are farther apart than expected from ordinary within-group noise. The p-value indicates how surprising that F-statistic would be if all group means were equal. ANOVA identifies evidence of a difference somewhere among the groups, but follow-up comparisons are needed to determine which groups differ. Independence, variance similarity, and distribution shape affect interpretation.