Disco Fever is randomly found in one half of one percent of the general population.Testing a swatch of clothing for the presence of polyester is 99% effective in detecting the presence of this disease.The test also yields a false-positive in 4% of the cases where the disease is not present.What is the probability that the test result is positive if the disease is absent?
A)0.01
B)0.05
C)0.055
D)0.04

Question

Quizplus · Accepted Answer

Since the disease is absent, the probability of a false-positive is 4%, which is given in the question. Therefore, the probability of a positive test result when the disease is absent is 0.04 or 4%.

Disco Fever Is Randomly Found in One Half of One