WGU D514 Final Exam QUESTIONS AND ANSWERS
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SECTION 1: RESEARCH METHODOLOGY & STUDY DESIGN
Question 1
Which approach should be used to construct a database used for comparing
pretest and post-test results for a new drug intervention?
A) Rollup
B) Flat file
C) Object-oriented
D) Research-identified
Answer: D) Research-identified
Rationale: Research-identified databases are specifically designed for comparing
pretest and post-test results in clinical research. They are structured to track
individual patient outcomes across time points .
Question 2
A researcher wants to determine whether continuity of care is improved with the
use of coordination of care documents among primary care physicians and
specialists. The researcher decides to review various published studies to assess
the clinical effectiveness of these documents on patient outcomes. Which
research method is being used?
A) Case study
B) Cohort study
,C) Meta-analysis
D) Literature review
Answer: C) Meta-analysis
Rationale: A meta-analysis systematically reviews and statistically combines
results from multiple published studies to draw broader conclusions about clinical
effectiveness .
Question 3
A state public health researcher wants to begin a five-year initiative to coordinate
immunizations for children in the foster care system. The results will be compared
to previous years to measure the effectiveness of the initiative. Which research
method should be used to study this initiative?
A) Case study
B) Cohort study
C) Longitudinal study
D) Pre/post-study
Answer: D) Pre/post-study
Rationale: A pre/post-study compares outcomes before and after an intervention.
This design is appropriate when measuring the impact of a new initiative against
historical data .
Question 4
Which of the following is a characteristic of qualitative research methods?
A) Utilizes large sample sizes
B) Determines causal relationships
C) Generalizes results to the population
D) Introduces subjectivity to data collection
, Answer: D) Introduces subjectivity to data collection
Rationale: Qualitative research is inherently subjective, focusing on understanding
experiences, perceptions, and meanings through methods like interviews and
observations. It does not typically use large samples, determine causality, or
generalize to populations .
Question 5
A physical activity initiative seeks to determine if the number of days participants
exercise varies by gender in order to determine the focus of the next phase of the
initiative. Which type of variable is needed to make this determination?
A) Interval variable
B) Ordinal variable
C) Continuous variable
D) Categorical variable
Answer: D) Categorical variable
Rationale: Gender is a categorical (nominal) variable—it places individuals into
distinct groups without inherent numerical order. To analyze variation by gender,
the gender variable must be categorical .
Question 6
What is the difference between a cross-sectional study and a time-series study?
A) Cross-sectional analyzes data from one point in time; time-series analyzes data
over multiple time intervals
B) Cross-sectional analyzes data over time; time-series analyzes data at one point
in time
C) Cross-sectional is qualitative; time-series is quantitative
D) There is no difference
ALREADY GRADED A+. 100% Verified Solutions |
Updated Per Latest Guidelines | Graded A+
SECTION 1: RESEARCH METHODOLOGY & STUDY DESIGN
Question 1
Which approach should be used to construct a database used for comparing
pretest and post-test results for a new drug intervention?
A) Rollup
B) Flat file
C) Object-oriented
D) Research-identified
Answer: D) Research-identified
Rationale: Research-identified databases are specifically designed for comparing
pretest and post-test results in clinical research. They are structured to track
individual patient outcomes across time points .
Question 2
A researcher wants to determine whether continuity of care is improved with the
use of coordination of care documents among primary care physicians and
specialists. The researcher decides to review various published studies to assess
the clinical effectiveness of these documents on patient outcomes. Which
research method is being used?
A) Case study
B) Cohort study
,C) Meta-analysis
D) Literature review
Answer: C) Meta-analysis
Rationale: A meta-analysis systematically reviews and statistically combines
results from multiple published studies to draw broader conclusions about clinical
effectiveness .
Question 3
A state public health researcher wants to begin a five-year initiative to coordinate
immunizations for children in the foster care system. The results will be compared
to previous years to measure the effectiveness of the initiative. Which research
method should be used to study this initiative?
A) Case study
B) Cohort study
C) Longitudinal study
D) Pre/post-study
Answer: D) Pre/post-study
Rationale: A pre/post-study compares outcomes before and after an intervention.
This design is appropriate when measuring the impact of a new initiative against
historical data .
Question 4
Which of the following is a characteristic of qualitative research methods?
A) Utilizes large sample sizes
B) Determines causal relationships
C) Generalizes results to the population
D) Introduces subjectivity to data collection
, Answer: D) Introduces subjectivity to data collection
Rationale: Qualitative research is inherently subjective, focusing on understanding
experiences, perceptions, and meanings through methods like interviews and
observations. It does not typically use large samples, determine causality, or
generalize to populations .
Question 5
A physical activity initiative seeks to determine if the number of days participants
exercise varies by gender in order to determine the focus of the next phase of the
initiative. Which type of variable is needed to make this determination?
A) Interval variable
B) Ordinal variable
C) Continuous variable
D) Categorical variable
Answer: D) Categorical variable
Rationale: Gender is a categorical (nominal) variable—it places individuals into
distinct groups without inherent numerical order. To analyze variation by gender,
the gender variable must be categorical .
Question 6
What is the difference between a cross-sectional study and a time-series study?
A) Cross-sectional analyzes data from one point in time; time-series analyzes data
over multiple time intervals
B) Cross-sectional analyzes data over time; time-series analyzes data at one point
in time
C) Cross-sectional is qualitative; time-series is quantitative
D) There is no difference
