A significant ANOVA indicates that all pairs of group means significantly differ.

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A significant ANOVA only indicates that there is at least one group mean that significantly differs from at least one other group mean, but it does not necessarily mean that all pairs of group means significantly differ. Post-hoc tests or pairwise comparisons are needed to determine which specific pairs of means are significantly different.

A Significant ANOVA Indicates That All Pairs of Group Means