he Gold Coast hospital is testing patients for COVID-19. If a patient has the disease, the test is designed to return a "positive" result. If a patient does not have the disease, the test should return a "negative" result. As we know, no test is perfect though. For this test, 99% of patients who have COVID-19 will test positive (i.e., the test has a 'false negative' rate of 1%). Also, 5% of patients who don't have COVID-19 will also test positive (i.e., the test has a 'false positive' rate of 5%). The actual percentage of patients with the disease is 10%.