What is the positive predictive value of a test in which 220 tested individuals with positive test results actually have the disease and 45 tested individuals with positive test results do not have the disease?

Question

Quizplus · Accepted Answer

Positive predictive value (PPV) is the probability that a positive test result is truly positive. It is given by the formula: 
PPV = true positives / (true positives + false positives)

From the information given, we have: 
True positives = 220 
False positives = 45

Plugging these values into the formula: 
PPV = 220 / (220 + 45) = 83%

Therefore, the best choice is C, with a PPV of 83%.

What Is the Positive Predictive Value of a Test in Which