statsmodels.stats.oneway.wellek_to_f2¶ statsmodels.stats.oneway.wellek_to_f2(eps, n_groups)[source]¶ Convert Wellek’s effect size (sqrt) to Cohen’s f-squared This computes the following effect size : f2 = 1 / n_groups * eps**2 Parameters: epsfloat or ndarrayWellek’s effect size used in anova equivalence test n_groupsintNumber of groups in oneway comparison Returns: f2effect size Cohen’s f-squared