Posted by **Erica** on Friday, January 27, 2012 at 6:51am.

A screening test for a disease shows a positive test result in 95% of all cases when the disease is actually present and in 20% of all cases when it is not. When the test was administered to a large number of people, 21.5% of the results were positive. What is the prevalence of the disease?

Thank you for the help!

## Answer This Question

## Related Questions

- probability - Consider a medical screening excersis for a disease that in the ...
- probability - A new test for detecting a disease has been developed. Medical ...
- Probability - Suppose that 3% of the population ha a certain disease. We have a ...
- math - This is a statistics problem. A laboratory test for the detection of a ...
- STAT - The probability of getting a certain disease is 0.2. A certain test is ...
- STAT Help Please! - The probability of getting a certain disease is 0.2. A ...
- Statistics - A certain disease occurs in 4% of the population. A blood test for ...
- Probability Questions - STAT - 1) The probability of getting a certain disease ...
- epidemiology - A new screening test for a disease is developed for use in the ...
- epidemiology - A new screening test for a disease is developed for use in the ...

More Related Questions