[Rd] variance of a scalar (PR#546)
Fri, 19 May 2000 10:11:00 +0100 (BST)
On Fri, 19 May 2000, Prof Brian Ripley wrote:
> > I thought that might be the reason. There is no mention of using n-1
> > rather than n in the denominator on the help page. Perhaps that might be
> > added?
> Um. What professional statistics package uses n, then? Are you
> suggesting that there is serious room for doubt?
Well, I may not be the gold standard for statisticians but I just called
var(x) when x was the population, not a sample. Unfortunately I did this
without thinking as it corresponds closely to my notes. So although a
statistics package might use n-1 without question, I think a statistical
computing environment could be a little more flexible, at least in its
Jonathan Rougier Science Laboratories
Department of Mathematical Sciences South Road
University of Durham Durham DH1 3LE
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