Achieved confidence of ci (the discrete order statistics cannot hit confidence exactly).
Hodges–Lehmann estimate of η₁ − η₂: median of all pairwise differences.
U for the first sample (scipy mannwhitneyu statistic).
Wilcoxon rank-sum W of the first sample (what Minitab prints).
Confidence interval for η₁ − η₂ from the ordered pairwise differences (Minitab's method).