In: Statistics and Probability
QUESTION 1
If a person doesn’t have a disease and they test negative for it, it is an example of:
False positive |
||
True Positive |
||
True negative |
||
False negative |
QUESTION 2
When collecting data with multiple researchers, how a researcher views the data can affect the outcome of the study. To avoid this issue a researcher should assess:
Sensitivity |
||
Homogeneity |
||
Inter-Rater reliability |
||
Content validity |
QUESTION 3
The likelihood of a sick patient testing positive for a disease is:
Specificity |
||
Reliability |
||
Predictive Validity |
||
Sensitivity |
||
None of the above |
QUESTION 4
You have discovered a new tool that records the outcome of sexually transmitted diseases. A previously validated tool reports that genital herpes is 40% in Chicago. The correlation between the old tool and your tool is .5. This result indicates:
Convergent validity |
||
Divergent validity |
||
Content validity |
||
Ratio |
QUESTION 5
A test is developed for adolescent Hispanic mothers. The wording of the test is at a fifth grade level and in English. If the participants cannot read English, what does this affect?
Validity |
||
Sampling stability |
||
Measurement capacity |
||
Inter-rater reliability |
QUESTION 6
A doctor at Lakeside hospital discovered a test that was a very successful at correctly identifying when a person has the H1N1 virus. This would be a measure of:
Sensitivity |
||
Specificity |
||
Convergent validity |
||
Homogeneity |
QUESTION 7
If a patient does not have a disease, the probability that the test for the disease will be negative:
Readability |
||
Specificity |
||
Sensitivity |
||
Negative predictive value |
QUESTION 8
The Chembio test can be used to screen HIV-infected patients for hepatitis C. According to the CDC, the prevalence of HIV and HCV co-infection is approximately 25%. Use the outcome from the screening test (results below) for the Chembio HCV Rapid Test to determine the likelihood that a randomly selected HIV-infected patient will also have an HCV infection given their Chembio HCV Rapid Test returns a positive result. That is, determine P(HCV Infection | Positive Chembio HCV Test).
Round answer to nearest tenth of a percent (i.e. 79.2%).
Positive Chembio Test Result |
Negative Chembio Test Result |
|
Hepatitis C |
335 |
37 |
No Hepatitis C |
15 |
1153 |