3 ms·
No, that is not what they say. They say that because the number of people that are actually positive is low, the number of false positives may be high when com
by tinus_hn 6y ago
No, that is not what they say.
They say that because the number of people that are actually positive is low, the number of false positives may be high when compared to the actual number of positives.
This does not mean it’s wrong 50% of the time, it’s a statistical trick.
- im3w1l 6y agoIn jargon, the precision is lower than 50%. https://en.wikipedia.org/wiki/Precision_and_recall https://en.wikipedia.org/wiki/Precision_and_recall
- contravariant 6y agoTechnically that description is correct, but people might confuse that definition of precision with the false positive rate, which usually does not include the prior probabilities.