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Exercise 1 In some remote country, 2% of the population is affected by a virus. A...
3. There’s a zombie virus outbreak. The virus has already infected 2% of the world's population....
3. There’s a zombie virus outbreak. The virus has already infected 2% of the world's population. The infected people will eventually turn into zombies, so we want to isolate them now, before they become truly dangerous and infect other people. The scientists in AC Labs invented a test kit for the virus. The test’s sensitivity is 95% (i.e., for 95% of the infected people the test result will be positive) and specificity is 95% (i.e., 95% of the non-infected the...
RBV testing Suppose that 1% of all people are infected with the rare banana virus (RBV)....
RBV testing Suppose that 1% of all people are infected with the rare banana virus (RBV). There is a test to detect the RBV: if you do have the RBV, then the test will correctly detect this 99% of the time; if you do not have RBV, then the test will correctly indicate this 97% of the time. We assume that if the RBV test is given repeatedly to the same person, then the test results are independent of cach...
18. Imagine that coronavirus has a 0.002% incidence in the population. A test for the virus...
18. Imagine that coronavirus has a 0.002% incidence in the population. A test for the virus has a 0.001% false positive rate and no false negative rate (false positive rate means the chance that if an uninfected individual takes the test the test will falsely identify them as infected). If a random person takes the test and gets a positive result, what is the chance that they are infected? (Show your work to earn partial credit) (4 points) Now consider...
Can you answer this please fast In a pandemic respiratory infectious disease caused by a virus...
Can you answer this please fast
In a pandemic respiratory infectious disease caused by a virus A, the diagnostic test has been developed and carried out. Under this test when an individual actually has the disease with a positive result (true-positive test) occurs with the probability of 0.99, whereas an individual without the disease will show a positive test result (false-positive test) with the probability of 0.02. What is more, scientists have shown that 1 out of 1000 adults is...
6. Imagine that Zika virus has a 1% incidence in the population. A test for the...
6. 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? 7. Imagine that human papillomavirus has a 40% incidence among people 21-30 years of age. A test for the virus has a 50% false negative rate but no false positive rate. If you get...
Enzyme immunoassay tests are used to screen blood specimens for the presence of antibodies to HIV,...
Enzyme immunoassay tests are used to screen blood specimens for the presence of antibodies to HIV, the virus that causes AIDS. Antibodies indicate the presence of the virus. The test is quite accurate but is not always correct. Here are approximate probabilities of positive and negative test results when the blood tested does and does not actually contain antibodies to HIV. Test Result Given antibodies are present 0.9975 0.0025 Given antibodies are absent 0.0060 0.9940 Suppose that 2% of a...
Hi, my answers seemed strange after using Bayes theorem, so I am unsure if I made the right calcu...
hi, my answers seemed strange after using Bayes theorem, so I am
unsure if I made the right calculations. Please show your work so I
can catch my error :)
Extra Credit: ELISA tests are used to screen donated blood for the presence of the AIDS virus. The test actually detects antibodies, substances that the body produces when the virus is present. When antibodies are present, ELISA is positive with probability about 0.997 and negative with probability about 0.003. When...
ltis known that 3% ofthe Uk's population carry a certain disease. Atest forthe disease is available Leave 5 whi...
ltis known that 3% ofthe Uk's population carry a certain disease. Atest forthe disease is available Leave 5 which always gives either a positive or a negative result. Given that the individual carries the disease, there is a 98% chance that the test will give a positive result. Given that the individual does not carry the disease, there is a 95% chance that the test will give a negative result. blank a) i) Joey takes the test and gets a...
2 pts 1 Details < > Question 16 A certain virus infects one in every 300...
2 pts 1 Details < > Question 16 A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 8% of the time if the person does not have the virus. (This 8% result is called a false positive.) Let A be the event the person is infected" and B be the event "the person tests positive". a) Find...
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...
RBV testing Suppose that 1% of all people are infected with the rare banana virus (RBV). There is a test to detect the RBV: if you do have the RBV, then the test will correctly detect this 99% of the time; if you do not have RBV, then the test will correctly indicate this 97% of the time. We assume that if the RBV test is given repeatedly to the same person, then the test results are independent of cach...
18. Imagine that coronavirus has a 0.002% incidence in the population. A test for the virus has a 0.001% false positive rate and no false negative rate (false positive rate means the chance that if an uninfected individual takes the test the test will falsely identify them as infected). If a random person takes the test and gets a positive result, what is the chance that they are infected? (Show your work to earn partial credit) (4 points) Now consider...
Can you answer this please fast
In a pandemic respiratory infectious disease caused by a virus A, the diagnostic test has been developed and carried out. Under this test when an individual actually has the disease with a positive result (true-positive test) occurs with the probability of 0.99, whereas an individual without the disease will show a positive test result (false-positive test) with the probability of 0.02. What is more, scientists have shown that 1 out of 1000 adults is...
6. 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? 7. Imagine that human papillomavirus has a 40% incidence among people 21-30 years of age. A test for the virus has a 50% false negative rate but no false positive rate. If you get...
Enzyme immunoassay tests are used to screen blood specimens for the presence of antibodies to HIV, the virus that causes AIDS. Antibodies indicate the presence of the virus. The test is quite accurate but is not always correct. Here are approximate probabilities of positive and negative test results when the blood tested does and does not actually contain antibodies to HIV. Test Result Given antibodies are present 0.9975 0.0025 Given antibodies are absent 0.0060 0.9940 Suppose that 2% of a...
hi, my answers seemed strange after using Bayes theorem, so I am
unsure if I made the right calculations. Please show your work so I
can catch my error :)
Extra Credit: ELISA tests are used to screen donated blood for the presence of the AIDS virus. The test actually detects antibodies, substances that the body produces when the virus is present. When antibodies are present, ELISA is positive with probability about 0.997 and negative with probability about 0.003. When...
ltis known that 3% ofthe Uk's population carry a certain disease. Atest forthe disease is available Leave 5 which always gives either a positive or a negative result. Given that the individual carries the disease, there is a 98% chance that the test will give a positive result. Given that the individual does not carry the disease, there is a 95% chance that the test will give a negative result. blank a) i) Joey takes the test and gets a...
2 pts 1 Details < > Question 16 A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 8% of the time if the person does not have the virus. (This 8% result is called a false positive.) Let A be the event the person is infected" and B be the event "the person tests positive". a) Find...
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...
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