Prevalence is the number of new cases in a population.
A. 
True
B. 
False
2.
Sensitivity is the ability of a test to correctly identify those who have the disease, while specificity is its ability to identify those who don't have the disease.
A. 
True
B. 
False
3.
The fecal immunochemical test is a screening test for colon cancer. If its specificity was 60% and its sensitivity was 80% and the negative predictive value was 25%. What is the prevalence of colon cancer?
A. 
0.9 (90%)
B. 
0.85 (85%)
C. 
0.8 (80%)
D. 
0.95 (95%)
4.
HIV antibody conformation test is a screening test for AIDS. Based on the table below, what is the probability of getting a negative test if the person is infected?
Test positive
Test negative
AIDS positive
420
90
AIDS negative
280
210
A. 
9/51
B. 
42/51
C. 
9/49
D. 
21/49
5.
Verbal fluency test is a screening test used for dementia. Based on the table below, what is probability of getting a negative reult that is really negative?
Dementia positive
Dementia negative
Positive test
640
100
Negative test
160
100
A. 
10/26
B. 
16/26
C. 
64/74
D. 
10/74
6.
The largest collection of entities for which there is an interest at a particular time is:
A. 
Population
B. 
Sample
C. 
Inference
D. 
Statistic
7.
Permitting examination of past trends is an advantage of which data collection techniques?
A. 
Using available information
B. 
Observing
C. 
Interviewing
D. 
Adminstering written questionnairs
8.
Time consuming is a disadvatage of which type of non-probablistic sampling?
A. 
Judgment sampling
B. 
Quota sampling
C. 
Convenience sampling
D. 
2 of the answers are correct
9.
An advantage of snowball sampling is that it is dependant
A. 
True
B. 
False
10.
Interviewing is a data collection method that is suitable for illiterate.
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