mvar2.2012ZXC: Two-sample Simultaneous Test of Mean and Variance by Zhang,...

In kisungyou/SHT: Statistical Hypothesis Testing Toolbox

Two-sample Simultaneous Test of Mean and Variance by Zhang, Xu, and Chen (2012)

Description

Given two univariate samples x and y, it tests

H_0 : \mu_x = \mu_y, \sigma_x^2 = \sigma_y^2 \quad vs \quad H_1 : \textrm{ not } H_0

using exact null distribution for likelihood ratio statistic.

Usage

mvar2.2012ZXC(x, y)

Arguments

x	a length-n data vector.
y	a length-m data vector.

Value

a (list) object of S3 class htest containing:

statistic

a test statistic.

p.value

p-value under H_0.

alternative

alternative hypothesis.

method

name of the test.

data.name

name(s) of provided sample data.

References

\insertRef

zhang_exact_2012SHT

Examples

## CRAN-purpose small example
x = rnorm(10)
y = rnorm(10)
mvar2.2012ZXC(x, y)

## Not run: 
## empirical Type 1 error 
niter   = 1000
counter = rep(0,niter)  # record p-values
for (i in 1:niter){
  x = rnorm(100)  # sample x from N(0,1)
  y = rnorm(100)  # sample y from N(0,1)
  
  counter[i] = ifelse(mvar2.2012ZXC(x,y)$p.value < 0.05, 1, 0)
  print(paste("* mvar2.2012ZXC : iteration ",i,"/",niter," complete.",sep=""))
}

## print the result
cat(paste("\n* Example for 'mvar2.2012ZXC'\n","*\n",
"* number of rejections   : ", sum(counter),"\n",
"* total number of trials : ", niter,"\n",
"* empirical Type 1 error : ",round(sum(counter/niter),5),"\n",sep=""))

## End(Not run)

kisungyou/SHT documentation built on Feb. 27, 2025, 6:12 a.m.