Quote Originally Posted by trampie09 View Post
If you think there is unknown missing data then what are you blabbing on about ?, If you take a huge sample of people and test them weighting the sample by age, gender, social situation, ethnicity etc etc to match them to the entire area that they represent then find out who has it, who has had it and who has not had it, and you keep on testing over a long period of time then you can build up a picture of where, who, when, trends etc
And, has all this happened to ascertain a 70% success rate?