An outbreak of the fatal "CHANADRIAN" disease is occurring. It is a rare disease that affects...
An outbreak of the fatal "CHANADRIAN" disease is occurring. It is a rare disease that affects only 0.1% of the population but it highly contagious. A screening test has been developed that has specificity of 90% and sensitivity of 99%. If you undergo the screening test and it is positive what are the chances you have CHANADRIAN? What if you test negative?
Homework Answers
P(Disease) = 0.1% = 0.001
P(True positive rate) = Sensitivity = 99%
Thus, P(Disease | Positive) = 0.99
P(True negative rate) = Specificity = 90%
Thus, P(Disease | Negative) = 1 - 0.90 = 0.10
Add Answer to:
An outbreak of the fatal "CHANADRIAN" disease is
occurring. It is a rare disease that affects...
2. A rare disease affects 1% of the population. A test has a sensitivity of 98%,...
2. A rare disease affects 1% of the population. A test has a sensitivity of 98%, i.e., it will give a positive result 98% of the time that a person actually has the disease. The same test also has a specificity of 95%, i.e., it will give a negative result 95% of the time when a person does not have the disease. Denote the event that a randomly person has a disease by D, and the event that a randomly...
Medical screening tests are used to check for the presence on disease, evidence of illegal drug...
Medical screening tests are used to check for the presence on disease, evidence of illegal drug use, etc. The its sensitivity and its specificity. The sensitivity among those with the condition that will test positive. The specichy proportion among those without the condition that will test neg sensitivity of a test is defined to be the conditional ng those without the condition that will test negative. More formally, the test is defined to be the conditional probability that a person...
Suppose that your company has just developed a new screening test for a disease and you...
Suppose that your company has just developed a new screening test for a disease and you are in charge of testing its validity and feasibility. You decide to evaluate the test on 1000 individuals and compare the results of the new test to the gold standard. You know the prevalence of disease in your population is 30%. The screening test gave a positive result for 292 individuals. Two hundred eighty-five (285) of these individuals actually had the disease on the...
A new screening test for Lyme disease is developed for use in the general population. The...
A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Three hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of Lyme disease among clinic attendees is 10%. Calculate the following values: The predictive value of a positive test The predictive value of a negative test
Q5. [20pts+5] Sasha has been randomly selected to take a screening test for a rare disease...
Q5. [20pts+5] Sasha has been randomly selected to take a screening test for a rare disease that affects 1% of the population. The test is known to report false positive results 2% of the time (conditional on being healthy) and to report false negative results 5% of the time (conditional on being sick). Note: A positive result indicates that you have the disease, a negative result, that you are healthy a) Answer the following (You can draw a two-way table...
ra Suppose a rare disease occurs in about 1 out of 1,000 people who are like...
ra Suppose a rare disease occurs in about 1 out of 1,000 people who are like you. A test for the disease has sensitivity of 92% and specificity of 87%. Using the technique described in this chapter, compute the probability (as a %) that you actually have the disease, given that your test results are positive. (Round your answer to two decimal places.) % 21
U wIll occur! 13, Porphyrs s a rare disease with a prevalence of about one in...
U wIll occur! 13, Porphyrs s a rare disease with a prevalence of about one in 10,000 people (0.01%). The sensitivity of the prophyria test is 82% while the test specificity is 96.3% (ie, 3.7% false positives). If a person tests positive for this disease, what is the probability that this person truly has this disease? 14. Urn I contains 5 white halle and
A new screening test for Lyme disease is developed for use in the general population. The...
A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 65% and 75%, respectively. Four hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of Lyme disease among clinic attendees is 15%. Calculate the predictive value of a negative test.
Only 1 in 1,000 is afflicted with a rare disease for which a diagnostic test has...
Only 1 in 1,000 is afflicted with a rare disease for which a diagnostic test has been developed. When a person has the disease , the test returns a positive result 99% of the time. However, when a person does not have the disease, the test shows a positive result only 2% of the time. When a person's test results are positive, in order to validate the results, a second test is given. The second test has the same accuracy...
A rare but serious disease, D, has been found in 0.01 percent of a certain population....
A rare but serious disease, D, has been found in 0.01 percent of a certain population. A test has been developed that will be positive, p, for 98 percent of those who have the disease and be positive for 3 percent of those who do not have the disease. Find the probability that a person tested as positive does not have the disease.
2. A rare disease affects 1% of the population. A test has a sensitivity of 98%, i.e., it will give a positive result 98% of the time that a person actually has the disease. The same test also has a specificity of 95%, i.e., it will give a negative result 95% of the time when a person does not have the disease. Denote the event that a randomly person has a disease by D, and the event that a randomly...
Medical screening tests are used to check for the presence on disease, evidence of illegal drug use, etc. The its sensitivity and its specificity. The sensitivity among those with the condition that will test positive. The specichy proportion among those without the condition that will test neg sensitivity of a test is defined to be the conditional ng those without the condition that will test negative. More formally, the test is defined to be the conditional probability that a person...
Q5. [20pts+5] Sasha has been randomly selected to take a screening test for a rare disease that affects 1% of the population. The test is known to report false positive results 2% of the time (conditional on being healthy) and to report false negative results 5% of the time (conditional on being sick). Note: A positive result indicates that you have the disease, a negative result, that you are healthy a) Answer the following (You can draw a two-way table...
ra Suppose a rare disease occurs in about 1 out of 1,000 people who are like you. A test for the disease has sensitivity of 92% and specificity of 87%. Using the technique described in this chapter, compute the probability (as a %) that you actually have the disease, given that your test results are positive. (Round your answer to two decimal places.) % 21
U wIll occur! 13, Porphyrs s a rare disease with a prevalence of about one in 10,000 people (0.01%). The sensitivity of the prophyria test is 82% while the test specificity is 96.3% (ie, 3.7% false positives). If a person tests positive for this disease, what is the probability that this person truly has this disease? 14. Urn I contains 5 white halle and
Most questions answered within 3 hours.
-
On October 1, 20X1, a company purchased a piece of land by
agreeing to pay the...
asked 2 minutes ago -
Jamie is doing a survey at her school about whether the students
feel the cafeteria food...
asked 6 minutes ago -
What are the roles of 3' and 5' untranslated regions in
mRNAs?
asked 8 minutes ago -
A domestic television receives antenna delivers a sky noise
power of -105 dBm to a matched...
asked 6 minutes ago -
What do you think are the chemical reactions involved in the
breathalyzer tests administered to potentially...
asked 22 minutes ago -
A random sample of 120 observations produces a mean of
38.2 from a population with a...
asked 29 minutes ago -
The average area of land burned by forest fires every year in
Canada is 2.5 million...
asked 31 minutes ago -
36. The basic difference between government bureaus and market
firms is that bureaus:
a. can...
asked 30 minutes ago -
java
- A recursive method findR() to search for a number in list
(ArrayList)
- A...
asked 49 minutes ago -
Which of the following is an example of a screen against adverse
selection? [Mark All That...
asked 48 minutes ago -
A worker drives a 0.560 kg spike into a rail tie with a 2.76 kg
sledgehammer....
asked 53 minutes ago -
Assume the following information concerning two stocks that make
up an index. What is the price-weighted...
asked 56 minutes ago