MannWhitney
data class MannWhitney(val first: Int, val second: Int, val greater: Long, val less: Long, val equal: Long, val exact: ExactP?)(source)
The Mann-Whitney U statistic of two samples of whole numbers, counted from pairs: greater pairs have the second value above the first, less below, equal tied. A tie counts half in twoU, so every number stays an integer. exact is null above EXACT_LIMIT samples a side.