wilcoxonZ: Wilcoxon z statistic

In rcompanion: Functions to Support Extension Education Program Evaluation

Wilcoxon z statistic

Description

Calculates the z statistic for a Wilcoxon two-sample, paired, or one-sample test.

Usage

wilcoxonZ(
  x,
  y = NULL,
  mu = 0,
  paired = FALSE,
  exact = FALSE,
  correct = FALSE,
  digits = 3
)

Arguments

x	A vector of observations.
y	For the two-sample and paired cases, a second vector of observations.
mu	For the one-sample case, the value to compare x to, as in wilcox.test
paired	As used in wilcox.test.
exact	As used in wilcox.test, default here is FALSE.
correct	As used in wilcox.test, default here is FALSE.
digits	The number of significant digits in the output.

Details

This function uses code from wilcox.test, and reports the z statistic, which is calculated by the original function but isn't returned.

The returned value will be NA if the function attempts an exact test.

For the paired case, the observations in x and and y should be ordered such that the first observation in x is paired with the first observation in y, and so on.

Value

A single statistic, z.

Author(s)

Salvatore Mangiafico, [e-mail], R Core Team

Examples

data(Pooh)
wilcoxonZ(x = Pooh$Likert[Pooh$Time==1], y = Pooh$Likert[Pooh$Time==2],
          paired=TRUE, exact=FALSE, correct=FALSE)

rcompanion documentation built on May 29, 2024, 8:42 a.m.