Please help with one problem
My first instinct is to suggest that you ask your professor or TA for help, since this looks remarkably like a homework problem. We are not here to do your work for you. Failing that, what have you tried? Have you gotten error messages or otherwise gone wrong? We will help with specific R questions presented with complete information as described in the posting guide. This isn't an R question. Sarah
On Thu, Dec 16, 2010 at 1:12 PM, diavolo_vam <venci9n at abv.bg> wrote:
It is interesting to graph the distribution of the standardized average as n increases. Do this when the Xi are uniform on [0; 1]. Look at the histogram when n is 1, 5, 10 and 25. Do you see the normal curve taking shape? (A rule of thumb is that if the Xi are not too skewed, then n > 25 should make the average approximately normal. You might want
f=function(n,a=0,b=1) {
mu=(b+a)/2 sigma=(b-a)/sqrt(12) (mean(runif(n,a,b))-mu)/(sigma/sqrt(n)) } where the formulas for the mean and standard deviation are given. )
Sarah Goslee http://www.functionaldiversity.org