vanWaerdenTest: van der Waerden's Normal Scores Test

In PMCMRplus: Calculate Pairwise Multiple Comparisons of Mean Rank Sums Extended

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 Nov. 27, 2023, 1:08 a.m.