statsmodels.sandbox.stats.runs.median_test_ksample

statsmodels.sandbox.stats.runs.median_test_ksample(x, groups)

chisquare test for equality of median/location

This tests whether all groups have the same fraction of observations above the median.

Parameters:

• x (array_like) – data values stacked for all groups
• groups (array_like) – group labels or indicator

Returns:

• stat (float) – test statistic
• pvalue (float) – pvalue from the chisquare distribution
• others ???? – currently some test output, table and expected