Hi, everyone

I use one detector like Scintillator, Aerogel Cherenkov counter.

When I get the total number of events N and the observed number of passed events k with cut condition, I can define efficiency.

efficiency=k/N

But I don’t know how to calculate Efficiency error.

I think TEfficiency method can calculate this, but I found method using two histogram.

If I have three data set (cut, N, k) instead of histgram.

How do I use TEfficiency and get efficincy error?

Please help me.