Hello.
On Thu, 29 Aug 2013 16:45:10 -0400, enzhong...@pnc.com wrote:
It seems that the method StatUtils.variance()uses (n-1) as the
divisor,
not n.
The method's documentation mentions it, as well as an alternative
that may better suit you.
[...]
Regards,
Gilles
-
It seems that the method StatUtils.variance()uses (n-1) as the divisor,
not n. I got the following results,
StatUtils.variance(new double[]{-1,0,1}) = 1.0
StatUtils.variance(new double[]{-2,-1,0,1,2}) = 2.5
It should use n as divisor and the result should be 2/3 and 2.0, right?
This is Apache C
