For a testing method, there is **sensitivity** <true positive rate = P(tested positive given that the situation is true)> and **specificity** <true negative rate = P(tested negative given that the situation is not true)>.
My question is why **specificity** is not defined by something like P(the situation is true given a positive test result), doesn’t that also tell us whether untargeted situations trigger positive?
In: Biology
Misread the OP
If you had a lopsided sample, with lots of “true” observations, your measure does not look bad when it is supposed to look bad if you guessed all observations are true.
Latest Answers