PairedData (version 0.5)

grambsch.test: Grambsch test of scale for paired samples

Description

Robust test of scale for paired samples

Usage

grambsch.test(x, y = NULL, alternative = c("two.sided", "less", "greater"))

Arguments

x

First sample

y

Second sample

alternative

Alternative hypothesis

Value

• A list with class "htest" containing the following components:
• statistic
  The value of the F-statistic
• p.value
  The p-value for the test
• null.value
  The specified hypothesized value of the ratio of variances (=1!)
• alternative
  A character string describing the alternative hypothesis
• method
  A character string indicating what type of test was performed
• data.name
  A character string giving the name(s) of the data

References

P.M. Grambsch. Simple robust tests for scale differences in paired data. Biometrika, 81, 359-372, 1994.

See Also

var.test, pitman.morgan.test, bonett.seier.test

Examples

z<-rnorm(20)
x<-rnorm(20)+z
y<-(rnorm(20)+z)*2
grambsch.test(x,y)