Dear experts,
I have events that I correct for some effects by giving them a weight. Then I call for each event Fill(value, weight) (after Sunw2()).
My issue is that I didn’t find a ROOT way to make the error computation taking into account error on the weights themselves. Is there a way to do so? Something like Fill(value, weight, sigma_weight) ?
Thank you very much.
Hi,
When computing uncertainties with weights it is assumed they do not have uncertainties and only the statistical flactuations of observing an event with a given weight is computed.
If you have significant weight uncertainty you need to model correctly your problem including a-priori uncertainty in the weights. This uncertainty might also depend on the observed value.
For this case you need to estimate yourself the global uncertainty
Lorenzo
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.