NUR 3270 NURSING RESEARCH AND
EVIDENCE-BASED PRACTICE FINAL
EXAM QUESTIONS WITH VERIFIED
ANSWERS AND DETAILED
EXPLANATIONS
1. A researcher is conducting a study to determine the effect of a new position protocol on
the incidence of pressure ulcers in intensive care patients. What is the independent variable
in this study?
A. The incidence of pressure ulcers
B. The new positioning protocol
C. The intensive care patients
D. The duration of the hospital stay
Answer: B
Conceptual Explanation: The independent variable is the intervention or condition being
manipulated or introduced to see if it causes a change in the outcome.
2. In a double-blind randomized controlled trial (RCT), which of the following groups are
unaware of the treatment assignment?
A. The participants only
,B. The researchers only
C. The Institutional Review Board (IRB) members
D. Both the participants and the researchers collecting data
Answer: D
Conceptual Explanation: Double-blinding ensures that neither the subjects nor the
investigators know who is receiving the active treatment, reducing bias.
3. Which type of qualitative research focuses on the lived experience of individuals regarding
a specific phenomenon?
A. Ethnography
B. Grounded Theory
C. Phenomenology
D. Historical Research
Answer: C
Conceptual Explanation: Phenomenology seeks to understand the ‘essence’ of a human
experience through the descriptions provided by those who lived it.
4. A nurse researcher finds a p-value of 0.02 in a study comparing two wound care
treatments. Using an alpha level of 0.05, how should the researcher interpret this result?
A. The result is statistically significant; reject the null hypothesis.
B. The result is not statistically significant; fail to reject the null hypothesis.
, C. The study has a high probability of a Type II error.
D. The clinical significance is automatically established by the p-value.
Answer: A
Conceptual Explanation: When the p-value (0.02) is less than the alpha level (0.05), the
results are statistically significant, allowing the rejection of the null hypothesis.
5. Which sampling method provides the highest level of representativeness and minimizes
selection bias?
A. Convenience sampling
B. Simple random sampling
C. Snowball sampling
D. Purposive sampling
Answer: B
Conceptual Explanation: Simple random sampling gives every member of the population
an equal chance of being selected, which minimizes bias compared to non-probability
methods.
6. A researcher is developing a new tool to measure patient anxiety. If the tool yields
consistent results when administered multiple times to the same stable group, the tool is said
to have high:
A. Validity
EVIDENCE-BASED PRACTICE FINAL
EXAM QUESTIONS WITH VERIFIED
ANSWERS AND DETAILED
EXPLANATIONS
1. A researcher is conducting a study to determine the effect of a new position protocol on
the incidence of pressure ulcers in intensive care patients. What is the independent variable
in this study?
A. The incidence of pressure ulcers
B. The new positioning protocol
C. The intensive care patients
D. The duration of the hospital stay
Answer: B
Conceptual Explanation: The independent variable is the intervention or condition being
manipulated or introduced to see if it causes a change in the outcome.
2. In a double-blind randomized controlled trial (RCT), which of the following groups are
unaware of the treatment assignment?
A. The participants only
,B. The researchers only
C. The Institutional Review Board (IRB) members
D. Both the participants and the researchers collecting data
Answer: D
Conceptual Explanation: Double-blinding ensures that neither the subjects nor the
investigators know who is receiving the active treatment, reducing bias.
3. Which type of qualitative research focuses on the lived experience of individuals regarding
a specific phenomenon?
A. Ethnography
B. Grounded Theory
C. Phenomenology
D. Historical Research
Answer: C
Conceptual Explanation: Phenomenology seeks to understand the ‘essence’ of a human
experience through the descriptions provided by those who lived it.
4. A nurse researcher finds a p-value of 0.02 in a study comparing two wound care
treatments. Using an alpha level of 0.05, how should the researcher interpret this result?
A. The result is statistically significant; reject the null hypothesis.
B. The result is not statistically significant; fail to reject the null hypothesis.
, C. The study has a high probability of a Type II error.
D. The clinical significance is automatically established by the p-value.
Answer: A
Conceptual Explanation: When the p-value (0.02) is less than the alpha level (0.05), the
results are statistically significant, allowing the rejection of the null hypothesis.
5. Which sampling method provides the highest level of representativeness and minimizes
selection bias?
A. Convenience sampling
B. Simple random sampling
C. Snowball sampling
D. Purposive sampling
Answer: B
Conceptual Explanation: Simple random sampling gives every member of the population
an equal chance of being selected, which minimizes bias compared to non-probability
methods.
6. A researcher is developing a new tool to measure patient anxiety. If the tool yields
consistent results when administered multiple times to the same stable group, the tool is said
to have high:
A. Validity
