statsmodels.stats.weightstats.CompareMeans.ztost_ind

CompareMeans.ztost_ind(low, upp, usevar='pooled')

test of equivalence for two independent samples, based on z-test

Parameters:

• low (float) – equivalence interval low < m1 - m2 < upp

• upp (float) – equivalence interval low < m1 - m2 < upp

• usevar (str, 'pooled' or 'unequal') – If pooled, then the standard deviation of the samples is assumed to be the same. If unequal, then Welch ttest with Satterthwait degrees of freedom is used

Returns:

• pvalue (float) – pvalue of the non-equivalence test

• t1, pv1 (tuple of floats) – test statistic and pvalue for lower threshold test

• t2, pv2 (tuple of floats) – test statistic and pvalue for upper threshold test