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statsmodels.stats.weightstats.CompareMeans.ztost_ind

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

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

Parameters:

low, upp : float

equivalence interval low < m1 - m2 < upp

usevar : string, ‘pooled’ or ‘unequal’

If pooled, then the standard deviation of the samples is assumed to be the same. If unequal, then Welsh 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

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