Question 12
A hospital uses a rapid test for disease X. (i) The community prevalence is 0.5%. (ii) Sensitivity, the probability of a positive result for a sick person, is 99%. (iii) Specificity, the probability of a negative result for a healthy person, is 95%. A randomly selected community member tests positive. Which option is closest to the probability that this person actually has X?
The following source mathematical images preserve the printed option/formula/figure variants; text and choices above or below provide clean typesetting.
The following source mathematical images preserve the printed option/formula/figure variants; text and choices above or below provide clean typesetting.