Robuta

https://www.wolfram.com/mathematica/new-in-8/parameter-estimation-and-testing/choose-parametric-tests-or-their-nonparametric-cou.html
chooseparametrictestscounterpartsnew
https://www.nber.org/papers/w10105
Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings...
nonparametric testscommon valuesfirst pricesealed bid
https://www.datacamp.com/doc/r/nonparametric
Learn nonparametric tests in R: Mann-Whitney U, Wilcoxon Signed Rank, Kruskal Wallis, Friedman tests. Use wilcox.test, kruskal.test, friedman.test functions.
nonparametric testsgroupdifferences