© 2000 Todd Neller.  A.I.M.A. text figures © 1995 Prentice Hall.  Used by permission.
Applying Bayes’ Rule (cont.)
•Given:
–P(S|M) = 0.5
–P(M) = 1/50000
–P(S) = 1/20
•What's the probability that a patient with a stiff neck has meningitis?