stats
NullDistribution.
pdf
Evaluates the fitted emirical null Z-score density.
zscores : scalar or array-like
The point or points at which the density is to be evaluated.
The empirical null Z-score density evaluated at the given
points.
statsmodels.stats.multitest.NullDistribution
statsmodels.sandbox.stats.multicomp.varcorrection_pairs_unbalanced