onewaytests (version 1.1)

kw.test: A Function to Perform Kruskal-Wallis Rank Sum Test

Description

kw.test performs Kruskal-Wallis rank sum test.

Usage

kw.test(y, group, na.rm = TRUE)

Arguments

y

a numeric vector of data values.

group

a vector or factor object giving the group for the corresponding elements of y.

na.rm

a logical value indicating whether NA values should be stripped before the computation proceeds.

Value

A list with class "htest" containing the following components:

statistic

the Kruskal-Wallis rank sum statistic.

parameter

the parameter(s) of the approximate chi-squared distribution of the test statistic.

p.value

the p-value of the test.

References

Sheskin, D. J. (2004). Handbook of Parametric and Nonparametric Statistical Procedures. 3rd Edition. Chapman and Hall CRC. Florida: Boca Raton.

Examples

kw.test(iris$Sepal.Length,iris$Species)