Reliability of a screening test means getting the correct results while validity of the screening test means getting the same results every time.
A.
True
B.
False
2.
Sensitivity and specificity have an inverse relationship.
A.
True
B.
False
3.
In a population, a screening test for corona was done. If the sensitivity of the test was 90% and the specificity was 95% and the positive predictive value (PPV) was 9%. What is the prevalence of corona?
A.
0.0054 (0.54%)
B.
0.0053 (0.53%)
C.
0.0055 (0.55%)
D.
0.0052 (0.55%)
4.
The fasting plasma glucose test is used in screening for DM. Based on the results below, what is the probability of the test to give a positive result if the person doesn't have the disease?
Positive test
Negative Test
DM positive
50
30
DM negative
40
20
A.
2/3
B.
5/8
C.
3/8
D.
5/9
5.
Amniocentesis is a screening test for NTD. Based on the following table, what is the probability of the test to be positive if the patient has the disese?
NTD positive
NTD negative
Positive Amniocentesis
400
60
Negative Amniocentesis
400
140
A.
1/2
B.
3/10
C.
20/27
D.
20/23
6.
Parameter and statistic are types of:
A.
Statistical measures
B.
Data collection techniques
C.
Statistical methods
D.
Sampling methods
7.
Descriptive statistics is the reaching of decisions about a large body of data by examining only a small part of the data.
A.
True
B.
False
8.
All kinds of measurements are observations.
A.
True
B.
False
9.
Ethical issues regarding confidality may arise in which of the following data collection methods?
A.
Observing
B.
Interviewing
C.
Focus Group Discussions
D.
Adminstering written questionnaires
10.
Which of the following statements about probabilistic sampling is not correct?
A.
Multistage sampling has a low cost.
B.
Systemic random sampling are easy to verify.
C.
Stratified sampling divides the population into 2 or more differnt groups.
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