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Explain why post-hoc tests are needed for an ANOVA, and whether it would or would not...

Explain why post-hoc tests are needed for an ANOVA, and whether it would or would not be conducted if the decision from the ANOVA was to fail to reject the null hypothesis.

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Answer #1

whether it would or would not be conducted if the decision from the ANOVA was to fail to reject the null hypothesis.

If we fail to reject the null hypothesis that says all the means are equal or there is no treatment effect we do not perform any post hoc test

Post hoc tests are needed after ANOVA to compare the pairs of samples in terms of their mean, if they are equal or not once the null hypothesis is rejected. We check if the pairs are different from each other or some are alike.

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