What should be done if the assumption of homogeneity of variance is violated?
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If this assumption is violated, a modified version of ANOVA, such as Welch's ANOVA, can be used, which does not require equal variances.
If the assumption of homogeneity of variance is violated, one solution is to use a statistical test that is robust to this violation, such as the Welch’s t-test, which doesn’t assume equal variances. Alternatively, transforming the data or using non-parametric tests can help address the issue and provide more reliable results.