Hi Steffen
MInuit is described in class TMinuit. See:
http://root.cern.ch/root/htmldoc/TMinuit.html
Concerning the statistical interpretation of the errors, there are two
references to the two Fred James books:
For a discussion of basic concepts, such as the meaning of the elements
of the error matrix, or setting of exact confidence
levels see:
1.F.James. Determining the statistical Significance of experimental
Results. Technical Report DD/81/02 and CERN
Report 81-03, CERN, 1981.
2.W.T.Eadie, D.Drijard, F.James, M.Roos, and B.Sadoulet. Statistical
Methods in Experimental Physics. North-Holland,
1971.
I am ccying your mail to Fred (he might be away for a few
days) and also to Matthias Winkler who is working on a new version
of Minuit.
Rene Brun
On Thu, 5 Jun 2003,
Steffen Grohmann wrote:
> Hello,
>
> I need to know the statistical meaning of the errors of fitted
> parameters in Minuit, when the fit works without problem. Are these
> errors equal to the standard deviation (square root of the mean square
> deviation of fitted parameters from the mean of the fitted parameter),
> meaning that 63 % of the values fall within the error margin?
>
> Unfortunately, the link on the TMinuit web page doesn't work
> http://root.cern.ch/root/html301/H1Bibliography.html
>
> Regards,
> Steffen
>
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