PairedData (version 0.5)

yuenp.test: Yuen test for paired samples

Description

Robust test of location for paired samples based on trimmed means, greatly inspired from Wilcox (2005)

Usage

yuenp.test(x, y = NULL, alternative = c("two.sided", "less", "greater"),
         mu = 0, conf.level = 0.95,tr=0.2)

Arguments

x

First sample

y

Second sample

alternative

Alternative hypothesis

mu

A priori difference of trimmed means

conf.level

Confidence level

tr

Percentage of trimming

Value

• A list with class "htest" containing the following components:
• statistic
  The value of the t-statistic.
• parameter
  The degrees of freedom for the t-statistic.
• p.value
  The p-value for the test.
• conf.int
  A confidence interval for the difference in trimmed means appropriate to the specified alternative hypothesis.
• estimate
  The estimated trimmed means
• null.value
  The specified hypothesized value of the trimmed mean difference.
• 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

Wilcox, R.R. (2005). Introduction to robust estimation and hypothesis testing. Academic Press.

See Also

t.test

Examples

z<-rnorm(20)
x<-rnorm(20)+z
y<-rnorm(20)+z+1
yuenp.test(x,y)