F-test of equality of variances F-test of equality of variances F-test of equality of variances F-test for equality of variances F test F-test for equality of variances can be badly affected by that assumption failure this section en.wikipedia.org/wiki/F-test_of_equality_of_variances can be badly affected by that assumption failure http://en.wikipedia.org/wiki/F-test_of_equality_of_variances en.wikipedia.org/wiki/F-test_of_equality_of_variances