Does the One-way ANOVA test on MATLAB check that the conditions for applying ANOVA are met?

Question

Fatemah Ebrahim on 11 Sep 2019

Edited: Adam Danz on 13 Sep 2019

ANOVA conditions:

(1) the observations are normally distributed for each group

(2) all groups have equal variances

(3) the error terms have a mean value of zero and are independent.

Or do I need to incorporate checks for whether or not these conditions are met before applying ANOVA?

Answer 1

Adam Danz on 11 Sep 2019

Edited: Adam Danz on 11 Sep 2019

Great question, +1

Matlab does not perform any assumption checks to my knowledge.

So yes, you need to perform those tests prior to running the ANOVA.

[addendum]

Depending on what you're doing, you may be able to use a nonparametric statistical test that doesn't require some of these assumptions to be met.