Nothing
PB=function(data,group,rept=100000){
n=tapply(data, group, length)
k=length(tapply(data, group, length))
xbar=tapply(data, group, mean)
var=tapply(data, group, var)
sb=sum(n*xbar^2/var)-((sum(n*xbar/var))^2)/(sum(n/var));
p=0;
for(i in 1:rept){
z=rnorm(k);
u=rchisq(k,n-1);
PB=(sum(z^2*(n-1)/u))-(((sum((sqrt(n)*z*(n-1))/(sqrt(var)*u)))^2)/(sum(n*(n-1)/(var*u))));
if(PB>sb){p=p+1}
}
pvalue=p/rept;
result=matrix(c(round(pvalue,digits=4)))
rownames(result)=c("p-value")
colnames(result)=c("Parametric Bootstrap")
return(t(result))
}
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