Dr Huang Knows That the Base Rate for a Disease

Multiple Choice

Dr. Huang knows that the base rate for a disease is 5 percent. Out of 1,000 people, this base rate indicates that _____ would have the disease. To test a patient, Dr. Huang will use a test that will correctly show that the disease is present in 80 percent of the people who actually have the disease. Thus, the _____ rate for the test is 80 percent.

A) 5; sensitivity
B) 5; true negative
C) 50; sensitivity
D) 50; true negative