FtmTest {npordtests}

Ferdhiana, Terpstra and Magel (FTM) Test

Description

FtmTest performs FTM test.

Usage

FtmTest(formula, data, alpha = 0.05, na.rm = TRUE, verbose = TRUE)

Arguments

formula

a formula of the form lhs ~ rhs where lhs gives the sample values and rhs the corresponding groups.

data

a data frame containing the variables in the formula formula

alpha

the level of significance to assess the statistical difference. Default is set to alpha = 0.05.

na.rm

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

verbose

a logical for printing output to R console.

Value

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

statistic

the FTM test statistic.

mean

the mean of the FTM test statistic.

variance

the variance of the FTM test statistic.

Z

the standardized test statistic.

p.value

the p-value of the test.

alpha

the level of significance.

method

the character string "FTM test".

data

a data frame containing the variables in which NA values (if exist) are removed.

formula

a formula of the form lhs ~ rhs where lhs gives the sample values and rhs the corresponding groups.

Author(s)

Bulent Altunkaynak

References

Ferdhiane, R., Terpstra, J., Magel, R.C. (2008). A nonparametric test for the ordered alternative based on Kendall's correlation coefficient. Communications in Statistics-Simulation and Computation, 37:6, 1117-1128.

Jonckheere, A. R. (1954). A Distribution-Free k-Sample Test Against Ordered Alternatives. Biometrika, 41, 133-145.

Examples

library(npordtests)

## Data from Jonckheere (1954)
data(jdata)
FtmTest(Y~X,jdata)