How common is it for a Covid test to give a false positive result? A false positive result occurs when a test reads positive. but the person does not have the disease: 3} Your Guess: Calculation Bayes Theorem! Prevalence of the disease matters and the accuracy of the test. Accuracyr of a test means that IF a person has Covid. that's the percent chance that person will test positive or IF a person does not have Covid. that's the percent chance that person will test negative. bl Let's look at the numbers of if the Covid Test is 98% accurate and Covid is in 10% of the population. For ease. let's calculate using a population of 5000 people: Test Positive Test Negative Totals: Disease Present 10% of population: 500 people Disease Not Present 90% of population: 4500 people Totals: c) Now if 1% of the population has Covid: ___ ___ d) How common is a false positive in each situation? 10%: 1%