Wednesday
April 16, 2014

Homework Help: math

Posted by Anonymous on Sunday, September 23, 2007 at 11:20pm.

This is a statistics problem.

A laboratory test for the detection of a certain disease give a positive result 5 percent of the time for people who do not have the disease. The test gives a negative result 0.3 percent of the time for people who have the disease. Large-scale studies have shown that the disease occurs in about 2 percent of the population.

What is the probability that a person selected at random would test positive for this disease?
For this one, I got 0.0194, so 1.94% but I wasn’t sure if the answer is correct.

What is the probability that a person selected at random who test positive for the disease does not have the disease?
This one was confusing to me… I got 0.71637, or 71.637% but I doubt this is right. Please help!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

statistics - In a certain population, 1% of all individuals are carriers of a ...
statistics - (Blood Test Problem) Suppose 100 people are waiting for blood test...
probability - A new test for detecting a disease has been developed. Medical ...
Probability - A screening test for a disease shows a positive test result in 95...
Probability - Suppose that 3% of the population ha a certain disease. We have a ...
Math - Can someone please help me? certain medical diagnostic test is used to ...
Probability - Can someone please help me? certain medical diagnostic test is ...
Probability - Can someone please help me? certain medical diagnostic test is ...
Probability - Suppose the prevalence of people with certain cancer in a give ...
tats - No(Did not lie) Yes(lied) positive test result 15(false positive) 42(true...

Search
Members