Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Tree diagram representing all possible outcomes of a diagnostic test. P(A) is the probability of Event A. P(B|A) is the conditional probability of Event B given Event A. FPR is the false positive rate = P(Positive test | Disease absent). FNR is the False negative rate = P(Negative test | Disease present).
