For an ANOVA test, rejection of the null hypothesis does not identify which treatment means differ significantly.

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Rejecting the null hypothesis in an ANOVA test only tells us that there is a significant difference between at least one of the treatment means. It does not identify specifically which treatment means differ significantly. Further post-hoc tests or comparisons must be used to determine which means are significantly different from each other.

For an ANOVA Test, Rejection of the Null Hypothesis Does