Assume Rovsing's Sign is a perfect indicator of appendicitis, in the sense that its presence confirms appendicitis beyond doubt. It is, however, rarely present. For these exercises, assume that the probability of appendicitis is 0.16 for the patient under consideration. Also assume that the probability of Rovsing's Sign in appendicitis is 0.0001, but that it never occurs unless appendicitis is present.
Question 10
Given that a patient has appendicitis, what is the probability that s/he exhibits Rovsing's Sign?
Question 11
Given that a patient does not have appendicitis, what is the probability that s/he exhibits Rovsing's Sign?
Question 12
Given that a patient exhibits Rovsing's Sign, what is the probability that s/he has appendicitis?
Question 13
Given that a patient does not exhibit Rovsing's Sign, what is the probability that s/he has appendicitis?
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