WGU C468 Nursing Research Final 2026/2027
COMPLETE ACCURATE TEST EXAM ACTUAL
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED SOLUTIONS)
|ALREADY GRADED A+||NEWEST VERSION
|BEST DOCUMENT FOR EXAM-2026/2027
1. A nurse is developing a clinical question using the PICO format. Which component
represents the “C”?
a. The population of interest
b. The outcome of the intervention
c. The comparison intervention or standard care
d. The time frame of the study
Correct Answer: C
Expert Rationale: In PICO, “C” stands for Comparison, which refers to the alternative
intervention or standard care used to evaluate the effectiveness of the primary intervention.
DIF: Knowledge
REF: PICO Framework
OBJ: Identify components of PICO
TOP: Research Fundamentals
2. A nurse is reviewing a study that manipulates one variable to observe its effect on
another. What type of study is this?
a. Descriptive study
b. Experimental study
c. Qualitative study
d. Correlational study
Correct Answer: B
Expert Rationale: Experimental studies involve manipulation of an independent variable to
determine its effect on a dependent variable.
,DIF: Knowledge
REF: Research Design
OBJ: Identify experimental research
TOP: Research Methods
3. Which characteristic best describes a randomized controlled trial (RCT)?
a. No comparison group
b. Random assignment to groups
c. Retrospective data analysis
d. Purely observational design
Correct Answer: B
Expert Rationale: RCTs randomly assign participants to intervention or control groups to reduce
bias and strengthen causality.
DIF: Knowledge
REF: Experimental Design
OBJ: Identify RCT characteristics
TOP: Evidence-Based Practice
4. A nurse reads a p-value of 0.01. What does this indicate?
a. The results are not significant
b. There is a 1% probability results are due to chance
c. The study is clinically significant
d. The null hypothesis is accepted
Correct Answer: B
Expert Rationale: A p-value of 0.01 indicates a 1% likelihood that results occurred by chance,
suggesting statistical significance.
DIF: Comprehension
REF: Statistics Basics
OBJ: Interpret p-values
TOP: Data Analysis
5. What does a Type I error represent in research?
a. Failing to reject a false null hypothesis
b. Rejecting a true null hypothesis
c. Incorrect data collection
d. Small sample size error
, Correct Answer: B
Expert Rationale: A Type I error occurs when a true null hypothesis is incorrectly rejected (false
positive).
DIF: Knowledge
REF: Statistical Errors
OBJ: Identify Type I error
TOP: Research Statistics
6. A nurse is reviewing qualitative research. Which data collection method is most
appropriate?
a. Blood pressure readings
b. Structured surveys with numbers
c. In-depth interviews
d. Laboratory test results
Correct Answer: C
Expert Rationale: Qualitative research focuses on lived experiences and uses interviews, focus
groups, and observations.
DIF: Knowledge
REF: Qualitative Methods
OBJ: Identify qualitative data collection
TOP: Research Approaches
7. What is the primary purpose of a systematic review?
a. Collect primary patient data
b. Summarize expert opinion
c. Synthesize findings from multiple studies
d. Conduct interviews with participants
Correct Answer: C
Expert Rationale: Systematic reviews critically analyze and combine multiple studies to provide
high-level evidence.
DIF: Knowledge
REF: Evidence Synthesis
OBJ: Define systematic review purpose
TOP: EBP
, 8. Which sampling method gives every member of a population an equal chance of
selection?
a. Convenience sampling
b. Snowball sampling
c. Random sampling
d. Purposive sampling
Correct Answer: C
Expert Rationale: Random sampling reduces selection bias by giving all individuals equal chance
of being chosen.
DIF: Knowledge
REF: Sampling Methods
OBJ: Identify probability sampling
TOP: Research Design
9. A nurse is reviewing a study with participants selected based on specific characteristics.
What sampling method is this?
a. Random sampling
b. Stratified sampling
c. Purposive sampling
d. Cluster sampling
Correct Answer: C
Expert Rationale: Purposive sampling selects participants intentionally based on study criteria.
DIF: Knowledge
REF: Sampling Techniques
OBJ: Identify non-probability sampling
TOP: Research Methods
10. What does reliability in a research instrument refer to?
a. Accuracy of measurement
b. Consistency of measurement
c. Generalizability of findings
d. Statistical significance
Correct Answer: B
Expert Rationale: Reliability refers to the consistency or repeatability of measurements over
time.
COMPLETE ACCURATE TEST EXAM ACTUAL
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED SOLUTIONS)
|ALREADY GRADED A+||NEWEST VERSION
|BEST DOCUMENT FOR EXAM-2026/2027
1. A nurse is developing a clinical question using the PICO format. Which component
represents the “C”?
a. The population of interest
b. The outcome of the intervention
c. The comparison intervention or standard care
d. The time frame of the study
Correct Answer: C
Expert Rationale: In PICO, “C” stands for Comparison, which refers to the alternative
intervention or standard care used to evaluate the effectiveness of the primary intervention.
DIF: Knowledge
REF: PICO Framework
OBJ: Identify components of PICO
TOP: Research Fundamentals
2. A nurse is reviewing a study that manipulates one variable to observe its effect on
another. What type of study is this?
a. Descriptive study
b. Experimental study
c. Qualitative study
d. Correlational study
Correct Answer: B
Expert Rationale: Experimental studies involve manipulation of an independent variable to
determine its effect on a dependent variable.
,DIF: Knowledge
REF: Research Design
OBJ: Identify experimental research
TOP: Research Methods
3. Which characteristic best describes a randomized controlled trial (RCT)?
a. No comparison group
b. Random assignment to groups
c. Retrospective data analysis
d. Purely observational design
Correct Answer: B
Expert Rationale: RCTs randomly assign participants to intervention or control groups to reduce
bias and strengthen causality.
DIF: Knowledge
REF: Experimental Design
OBJ: Identify RCT characteristics
TOP: Evidence-Based Practice
4. A nurse reads a p-value of 0.01. What does this indicate?
a. The results are not significant
b. There is a 1% probability results are due to chance
c. The study is clinically significant
d. The null hypothesis is accepted
Correct Answer: B
Expert Rationale: A p-value of 0.01 indicates a 1% likelihood that results occurred by chance,
suggesting statistical significance.
DIF: Comprehension
REF: Statistics Basics
OBJ: Interpret p-values
TOP: Data Analysis
5. What does a Type I error represent in research?
a. Failing to reject a false null hypothesis
b. Rejecting a true null hypothesis
c. Incorrect data collection
d. Small sample size error
, Correct Answer: B
Expert Rationale: A Type I error occurs when a true null hypothesis is incorrectly rejected (false
positive).
DIF: Knowledge
REF: Statistical Errors
OBJ: Identify Type I error
TOP: Research Statistics
6. A nurse is reviewing qualitative research. Which data collection method is most
appropriate?
a. Blood pressure readings
b. Structured surveys with numbers
c. In-depth interviews
d. Laboratory test results
Correct Answer: C
Expert Rationale: Qualitative research focuses on lived experiences and uses interviews, focus
groups, and observations.
DIF: Knowledge
REF: Qualitative Methods
OBJ: Identify qualitative data collection
TOP: Research Approaches
7. What is the primary purpose of a systematic review?
a. Collect primary patient data
b. Summarize expert opinion
c. Synthesize findings from multiple studies
d. Conduct interviews with participants
Correct Answer: C
Expert Rationale: Systematic reviews critically analyze and combine multiple studies to provide
high-level evidence.
DIF: Knowledge
REF: Evidence Synthesis
OBJ: Define systematic review purpose
TOP: EBP
, 8. Which sampling method gives every member of a population an equal chance of
selection?
a. Convenience sampling
b. Snowball sampling
c. Random sampling
d. Purposive sampling
Correct Answer: C
Expert Rationale: Random sampling reduces selection bias by giving all individuals equal chance
of being chosen.
DIF: Knowledge
REF: Sampling Methods
OBJ: Identify probability sampling
TOP: Research Design
9. A nurse is reviewing a study with participants selected based on specific characteristics.
What sampling method is this?
a. Random sampling
b. Stratified sampling
c. Purposive sampling
d. Cluster sampling
Correct Answer: C
Expert Rationale: Purposive sampling selects participants intentionally based on study criteria.
DIF: Knowledge
REF: Sampling Techniques
OBJ: Identify non-probability sampling
TOP: Research Methods
10. What does reliability in a research instrument refer to?
a. Accuracy of measurement
b. Consistency of measurement
c. Generalizability of findings
d. Statistical significance
Correct Answer: B
Expert Rationale: Reliability refers to the consistency or repeatability of measurements over
time.
