vanWaerdenTest: van der Waerden's Normal Scores Test

View source: R/vanWaerdenTest.R

vanWaerdenTestR Documentation

van der Waerden's Normal Scores Test

Description

Performs van der Waerden's normal scores test.

Usage

vanWaerdenTest(x, ...)

## Default S3 method:
vanWaerdenTest(x, g, ...)

## S3 method for class 'formula'
vanWaerdenTest(formula, data, subset, na.action, ...)

Arguments

x

a numeric vector of data values, or a list of numeric data vectors.

...

further arguments to be passed to or from methods.

g

a vector or factor object giving the group for the corresponding elements of "x". Ignored with a warning if "x" is a list.

formula

a formula of the form response ~ group where response gives the data values and group a vector or factor of the corresponding groups.

data

an optional matrix or data frame (or similar: see model.frame) containing the variables in the formula formula. By default the variables are taken from environment(formula).

subset

an optional vector specifying a subset of observations to be used.

na.action

a function which indicates what should happen when the data contain NAs. Defaults to getOption("na.action").

Details

For one-factorial designs with non-normally distributed residuals van der Waerden's normal scores test can be performed to test the H_0: F_1(x) = F_2(x) = \ldots = F_k(x) against the H_\mathrm{A}: F_i (x) \ne F_j(x)~ (i \ne j) with at least one strict inequality.

Note

A tie correction is not applied in this function.

References

Conover, W. J., Iman, R. L. (1979) On multiple-comparisons procedures, Tech. Rep. LA-7677-MS, Los Alamos Scientific Laboratory.

van der Waerden, B. L. (1952) Order tests for the two-sample problem and their power, Indagationes Mathematicae 14, 453–458.

See Also

kruskalTest, normalScoresTest

Examples

vanWaerdenTest(count ~ spray, data = InsectSprays)


PMCMRplus documentation built on May 29, 2024, 8:34 a.m.