Imagine that zika virus has a 1% incidence in the population. A test for the virus has a 3% false positive rate and no false negative rate. If someone takes the test and gets a positive result, what is the chance that they are infected?

The answer is 97%.

Explanation:

The zika virus' 1% incidence rate in the population has no effect over the probability of the patient being infected or not. If the test has a 3% false positive rate that means that if it is positive, the results have a 97% chance of being true. Therefore the chance that the person who took the test and had a positive result being actually infected is 97%.

I hope this answer helps.

There is 97% Chance that the person is infected.

Explanation:

According to the question, the test for the virus has 3% false positive and there is no false negative rate.

Therefore if someone takes the test and gets a positive result, the chances of the person to be infected ( True positive ) is

100 - 3 = 97%

Note: False positive result is a result that indicates that a given condition is present when it is not actually present.

Explanation:

  Today, we know that atoms contain protons, neutrons  and electrons.  The protons have significant mass and a positive charge and are found in the nucleus of the atom.  The neutrons have mass but no charge and are also found in the nucleus.  The electrons have negative charge and very little mass and are found outside the atom's nucleus.  The weight of an atom in atomic mass units is approximately the sum of its protons and neutrons, since the electrons don't have much mass.