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  2. Reduction in rank - Wikipedia

    en.wikipedia.org/wiki/Reduction_in_rank

    Reduction in rank may also refer to the voluntary, non-punitive practice of taking a lower rank, often as part of joining another military unit or military service. For example, those who join the Special Air Service or Australian Special Air Service Regiment take the rank of trooper , often a lower rank than their previous rank but with ...

  3. Demotion - Wikipedia

    en.wikipedia.org/wiki/Demotion

    A demotion is a compulsory reduction in an employee's rank or job title within the organizational hierarchy of a company, public service department, or other body. [1] A demotion may also lead to the loss of other privileges associated with a more senior rank and/or a reduction in salary or benefits.

  4. Rank test - Wikipedia

    en.wikipedia.org/wiki/Rank_test

    In statistics, a rank test is any test involving ranks. Rank tests are related to permutation tests. Motivation ... Examples. Wilcoxon signed-rank test;

  5. Rank error-correcting code - Wikipedia

    en.wikipedia.org/wiki/Rank_error-correcting_code

    There are several known constructions of rank codes, which are maximum rank distance (or MRD) codes with d = n − k + 1.The easiest one to construct is known as the (generalized) Gabidulin code, it was discovered first by Delsarte (who called it a Singleton system) and later by Gabidulin [2] (and Kshevetskiy [3]).

  6. Rank correlation - Wikipedia

    en.wikipedia.org/wiki/Rank_correlation

    Dave Kerby (2014) recommended the rank-biserial as the measure to introduce students to rank correlation, because the general logic can be explained at an introductory level. The rank-biserial is the correlation used with the Mann–Whitney U test, a method commonly covered in introductory college courses on statistics. The data for this test ...

  7. Low-rank approximation - Wikipedia

    en.wikipedia.org/wiki/Low-rank_approximation

    In mathematics, low-rank approximation refers to the process of approximating a given matrix by a matrix of lower rank. More precisely, it is a minimization problem, in which the cost function measures the fit between a given matrix (the data) and an approximating matrix (the optimization variable), subject to a constraint that the approximating matrix has reduced rank.

  8. United States military seniority - Wikipedia

    en.wikipedia.org/wiki/United_States_military...

    The only case where historical seniority has been legally established by the United States Congress is for the "super rank" of the armed forces of the United States General of the Armies. By clear precedent, the holders of this rank (three persons in all) are senior to all other officers of the United States military, past and present.

  9. Rank reversals in decision-making - Wikipedia

    en.wikipedia.org/wiki/Rank_reversals_in_decision...

    One way to test the validity of decision-making methods is to construct special test problems and then study the solutions they derive. If the solutions exhibit some logic contradictions (in the form of undesirable rank reversals of the alternatives), then one may argue that something is wrong with the method that derived them.