An ANOVA is used to determine whether any significant difference exists between treatment means,and posttests are used to determine exactly which treatment means are significantly different.

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An ANOVA is used to test for overall significant differences among treatment means, while posttests (such as Tukey's HSD or Bonferroni tests) are used to determine which specific pairs of means are significantly different from each other.

An ANOVA Is Used to Determine Whether Any Significant Difference