TRIPLESTEST - non-parameteric triples test for distributional symmetry (skewness)

H = TRIPLESTEST(X) performs the non-parametric triples test for   
symmetry (skewness) of the null hypothesis that the data in X comes   
from a symmetrical distribution with an unknown median. The test   
involves the examination of subsets of three variables from X (triples)   
to determine the likelihood that the distribution is skewed. H==0   
indicates that the null hypothesis cannot be rejected at the 5