statsmodels.stats.oneway.fstat_to_wellek

statsmodels.stats.oneway.fstat_to_wellek(f_stat, n_groups, nobs_mean)

Convert F statistic to wellek’s effect size eps squared

This computes the following effect size :

es = f_stat * (n_groups - 1) / nobs_mean

Parameters:

• f_stat (float or ndarray) – Test statistic of an F-test.

• n_groups (int) – Number of groups in oneway comparison

• nobs_mean (float or ndarray) – Average number of observations across groups.

Returns:

eps – Wellek’s effect size used in anova equivalence test

Return type:

float or ndarray