Quiz

A new at home test for HIV has gone through clinical trials. 500 patients took part in the study. They either receive a positive ("+") result or negative ("-") result. The table below shows the results.

	Has HIV	Does Not Have HIV	Row Total
Test Result "+"	120	30	150
Test Result "-"	10	340	350
Column Total	130	370	500

Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities.:

A. P("-", given the patient has HIV)

B. P("-" and the patient has HIV)

C. P("-" or the patient has HIV)