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…statistical procedure that tests
the hypothesis that the populations from which two or more groups of data were drawn
are identical. The distinct values in the combined data set are ordered from smallest to
largest, denoted z(1), z(2),… z(L), where L will be less than n if there are tied observations.
These rankings are used to compute the test…
https://www.wichita.edu/industry_and_defense/NIAR/Documents/NCAMP/Toray_TC1225_5HS_NCP-RP-2024-013_RevNC_8-1-2025_SAR_Final.pdf