TEfficiency example slightly wrong? What is the default confidence level?

ROOT
1

I am trying to get started with TEfficiency graphs. The documentation/example at root.cern.ch/doc/master/classTEfficiency.html#EFF063
is confusing me.

The plot “Different confidance levels” has 95% band smaller than 68.3 %. Is the legend wrong?
leg1->AddEntry(pEff,“95%”,“F”);
leg1->AddEntry(pCopy,“68.3%”,“F”);

should be
leg1->AddEntry(pEff,“68.3%”,“F”);
leg1->AddEntry(pCopy,“90%”,“F”);
?

I basically wanted to know the default value, which I guess is “one sigma equivalent”, or 68.3 %.

Nigel

2

Hello,

Thank you for posting this. It is true, the legend in the example is wrong, and it should be as you suggest. The default confidence level for TEfficiency is 68.3%.
I will make a PR fixing this example in the documentation.
Thanks again, best regards

Lorenzo

3

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.