Statistic Practice Test 
1. Which of the following is FALSE about secondary data analysis?
A. Locating data with specific variables of interest can be time consuming and sometimes a researcher may not make data available.
B. Information about how data was collected may be insufficient to determine whether there is bias.
C. It is very expensive compared to equivalent primary data collection*
D. It facilitates replication
2. A researcher wants to express the middle of a distribution of numbers, such that half the cases are higher and half lower than a value. What statistical measure should he use?
A. mean
B. median*
C. mode
D. standard deviation
3. A "codebook" is
A. only used in existing statistics research.
B. a document that tells the researcher where variables are located in the data file and what numbers go with variable attributes*
C. the set of instructions that tell interviewers or experimenters how to treat respondents or subjects.
D. an unnecessary part of data analysis since computers were invented.
4. Which of the following is/are aimed primarily at explanation?
A. univariate analysis.
B. bivariate analysis.
C. multivariate analysis.
D. b and c are both correct.*
5. Which of these is the best way to ask about income ranges?
A. 5,000 – 10,000; 10,000 – 20,000; 25,000- 30, 000
B. 5,000 – 10,000; 10,000 – 15,000; 15,000- 20, 000
C. 1, 000 – 9, 999; 10, 000 – 19,999; 20, 000 – 29, 999*
D. none of the above
6. Which of these are not parts in an experiment?
A. control group
B. post-test
C. longitudinal follow-up*
D. random assignment
7. Which of these is true of mail and self-administered questionnaires?
A. high response rate
B. well suited for illiterate or low literacy respondents
C. guarantee of the desired person filling it out
D. none of the above*
8. Descriptive statistics are measures that deal with one variable only.
A. True
B. False*
9. The standard deviation is a measure of dispersion for
A. Locating data with specific variables of interest can be time consuming and sometimes a researcher may not make data available.
B. Information about how data was collected may be insufficient to determine whether there is bias.
C. It is very expensive compared to equivalent primary data collection*
D. It facilitates replication
2. A researcher wants to express the middle of a distribution of numbers, such that half the cases are higher and half lower than a value. What statistical measure should he use?
A. mean
B. median*
C. mode
D. standard deviation
3. A "codebook" is
A. only used in existing statistics research.
B. a document that tells the researcher where variables are located in the data file and what numbers go with variable attributes*
C. the set of instructions that tell interviewers or experimenters how to treat respondents or subjects.
D. an unnecessary part of data analysis since computers were invented.
4. Which of the following is/are aimed primarily at explanation?
A. univariate analysis.
B. bivariate analysis.
C. multivariate analysis.
D. b and c are both correct.*
5. Which of these is the best way to ask about income ranges?
A. 5,000 – 10,000; 10,000 – 20,000; 25,000- 30, 000
B. 5,000 – 10,000; 10,000 – 15,000; 15,000- 20, 000
C. 1, 000 – 9, 999; 10, 000 – 19,999; 20, 000 – 29, 999*
D. none of the above
6. Which of these are not parts in an experiment?
A. control group
B. post-test
C. longitudinal follow-up*
D. random assignment
7. Which of these is true of mail and self-administered questionnaires?
A. high response rate
B. well suited for illiterate or low literacy respondents
C. guarantee of the desired person filling it out
D. none of the above*
8. Descriptive statistics are measures that deal with one variable only.
A. True
B. False*
9. The standard deviation is a measure of dispersion for