chisquare test for equality of median/location
This tests whether all groups have the same fraction of observations
above the median.
- Parameters:
- xnumpy:array_like
data values stacked for all groups
- groupsnumpy: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