Oskar Sandberg wrote:
> On Thu, Feb 07, 2002 at 12:21:41AM -0500, Tavin Cole wrote:
> It should be noted, again, that the deviation on those results is the
> deviation of the mean value over the number of hops made per request,
> not the deviation of the per hop value.
Ahh, so htlTimeExpected is per hop, while the deviation is per request?
That is not too obvious, mybe we can rename it to requestTimedeviation
or something else (or make it a true *PER_HOP*deviation)?
> Does anybody have any wishes regarding other statistical data we should
> keep? Min and max as well as frequency diagrams should be possible
> (though the latter would take a bit of memory)
Min, Max, Mean, and std deviations (maybe printing them in addition to
the sum, sum of squares) should be sufficient to measure what we need.
BTW, how do I get the std. dev out of SUM(X_i), SUM(X_i^2) and n? My
stats knowledge is a bit rusty.
std dev = SQRT(1/(n-1) * SUM((X_i-X_mean)^2*f_i))
doesn't work directly without some clever stuff.
Sebastian
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