Nothing
var.sigma <-
function(s,n)
{
###This function calculates the variance of the MLE estimator on a normal SD , i.e., (sample SD)
### var(s)=var(sqrt(sum(x_i-x_bar)^2)/(n-1))
###s: population SD
##n: sample size
0.5*s^2/(n-1)
}
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