MannWhitneyTest
MannWhitneyTest[{data1,data2}] tests whether the medians of data1 and data2 are equal.
MannWhitneyTest[dspec,μ0] tests the median difference against μ0.
MannWhitneyTest[dspec,μ0,"property"] returns the value of "property".
Please visit the official Wolfram Language Reference for more details and examples on core symbols.