Question

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Answer 1

After a meningitis outbreak in a hospital, a doctor estimates there is a 20% chance that any given patient
has meningitis. Each patient is tested using the above test. For patient A, the test comes out positive. What is the
chance that patient A has meningitis?

Answer 2

A new medical test for meningitis is evaluated on 500 patients, 50 of whom are known to have meningitis
and 450 of whom are known not to have meningitis. The results are shown in the table

Answer 3

Table:
Positive + known: 47
Positive + Not-known: 13
Negative + known: 3
Negative + Not-known: 437