WilcoxonSignedRankTest Class

public sealed class WilcoxonSignedRankTest : OneSampleTest

Public NotInheritable Class WilcoxonSignedRankTest
	Inherits OneSampleTest

public ref class WilcoxonSignedRankTest sealed : public OneSampleTest

[<SealedAttribute>]
type WilcoxonSignedRankTest = 
    class
        inherit OneSampleTest
    end

Inheritance

Object  →  HypothesisTest  →  OneSampleTest<Double>  →  OneSampleTest  →  WilcoxonSignedRankTest

Use the WilcoxonSignedRankTest class to test whether the median of signed differences is zero. The test removes zero differences, ranks the absolute nonzero differences using average ranks for ties, and computes the positive and negative rank sums.

The reported Statistic is always min(W+, W-), where W+ is the sum of ranks for positive differences and W- is the sum of ranks for negative differences. One-sided p-values are computed from W+, not from min(W+, W-).

Exact p-values are available only when the effective sample size is at most 50 and there are no ties. In Default, tied samples use the normal approximation automatically.

Reference