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rank sum

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  • rank sum test — a nonparametric statistical test for ordinal data, testing the null hypothesis that two samples are drawn from the same population versus the alternative hypothesis that the two samples are drawn from two populations having probability… …   Medical dictionary

  • Wilcoxon rank sum test — rank sum t …   Medical dictionary

  • Wilcoxon rank sum test signed rank test — Wil·cox·on rank sum test, signed rank test (wil kokґsən) [Frank Wilcoxon, American chemist and statistician, 1892–1962] see rank sum test and signed rank test, under test …   Medical dictionary

  • Rank of an abelian group — In mathematics, the rank, or torsion free rank, of an abelian group measures how large a group is in terms of how large a vector space over the rational numbers one would need to contain it; or alternatively how large a free abelian group it can… …   Wikipedia

  • Rank (linear algebra) — The column rank of a matrix A is the maximum number of linearly independent column vectors of A. The row rank of a matrix A is the maximum number of linearly independent row vectors of A. Equivalently, the column rank of A is the dimension of the …   Wikipedia

  • Rank (graph theory) — In graph theory, a branch of mathematics, the rank of an undirected graph is defined as the number n − c, where n is the number of vertices and c is the number of connected components of the graph. Equivalently, the rank of a graph is the rank of …   Wikipedia

  • Rank-dependent expected utility — The rank dependent expected utility model (originally called anticipated utility) is a generalized expected utility model of choice under uncertainty, designed to explain the behaviour observed in the Allais paradox, as well as for the… …   Wikipedia

  • Wilcoxon signed-rank test — The Wilcoxon signed rank test is a non parametric alternative to the paired Student s t test for the case of two related samples or repeated measurements on a single sample. The test is named for Frank Wilcoxon (1892 ndash;1965) who, in a single… …   Wikipedia

  • Spearman's rank correlation coefficient — In statistics, Spearman s rank correlation coefficient or Spearman s rho, named after Charles Spearman and often denoted by the Greek letter ho (rho) or as r s, is a non parametric measure of correlation ndash; that is, it assesses how well an… …   Wikipedia

  • Finite rank operator — In functional analysis, a finite rank operator is a bounded linear operator between Banach spaces whose range is finite dimensional. Finite rank operators on a Hilbert space A canonical form Finite rank operators are matrices (of finite size)… …   Wikipedia

  • Direct sum of modules — For the broader use of the term in mathematics, see Direct sum. In abstract algebra, the direct sum is a construction which combines several modules into a new, larger module. The result of the direct summation of modules is the smallest general… …   Wikipedia

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