doubts about how many false positives exists

["Ernesto" <ernestog () pa co cu>]

Greetings List:
I want to know how many false positives there are by
real positives. In other words which is the ratio of
false positives that we can find for each 100 real
positives on yours snort signature's data base. I hope
that you understand my question. I appreciate your
respond. Thanks
PD: I am Sorry for my English.