Class WilcoxonSignedRankDistribution

  • All Implemented Interfaces:
    ProbabilityDistribution

    public class WilcoxonSignedRankDistribution
    extends Object
    implements ProbabilityDistribution
    Compute the exact distribution of the Wilcoxon signed rank test statistic.

    Let x be a sample of size N from a continuous distribution symmetric about the origin. The Wilcoxon signed rank statistic is the sum of the ranks of the absolute values x[i] for which x[i] are positive. This statistic takes values between 0 and N(N+1)/2.

    The R equivalent functions are dsignrank, pdsignrank, qdsignrank, rdsignrank.