NUR 3270 EXAM 2: NURSING RESEARCH
AND EVIDENCE-BASED PRACTICE
QUESTIONS WITH VERIFIED ANSWERS
AND DETAILED EXPLANATIONS
1. A researcher is planning a study to explore the lived experience of patients undergoing
chemotherapy for the first time. Which research design is most appropriate for this
objective?
A. Grounded Theory
B. Quasi-experimental
C. Ethnography
D. Phenomenology
Answer: D
Conceptual Explanation: Phenomenology is the study of the lived experience and the
meaning of phenomena to individuals.
2. Which of the following describes a Type II error in quantitative research?
A. The researcher fails to reject a false null hypothesis.
B. The researcher rejects a true null hypothesis.
C. The researcher uses a sample size that is too large.
,D. The researcher applies an incorrect statistical test.
Answer: A
Conceptual Explanation: A Type II error (beta) occurs when the researcher concludes no
relationship exists when one actually does.
3. In a study assessing the impact of a new hand-washing protocol on infection rates, the
infection rate represents which variable?
A. Independent variable
B. Extraneous variable
C. Dependent variable
D. Confounding variable
Answer: C
Conceptual Explanation: The dependent variable is the outcome or effect that the
researcher is interested in measuring.
4. A nurse researcher uses a method of sampling where every member of the population has
an equal and independent chance of being selected. This is known as:
A. Convenience sampling
B. Purposive sampling
C. Simple random sampling
D. Snowball sampling
, Answer: C
Conceptual Explanation: Simple random sampling is a probability sampling method that
ensures every element has an equal chance of selection.
5. The nurse is reviewing a research article that uses a Likert scale to measure patient
satisfaction. This is an example of which level of measurement?
A. Nominal
B. Ratio
C. Interval
D. Ordinal
Answer: D
Conceptual Explanation: Likert scales are considered ordinal because they represent a
rank order, although the distance between points is not mathematically equal.
6. What is the primary purpose of an Institutional Review Board (IRB)?
A. To protect the rights and welfare of human subjects.
B. To ensure the study findings are statistically significant.
C. To verify the credentials of the lead researcher.
D. To provide funding for clinical research projects.
Answer: A
AND EVIDENCE-BASED PRACTICE
QUESTIONS WITH VERIFIED ANSWERS
AND DETAILED EXPLANATIONS
1. A researcher is planning a study to explore the lived experience of patients undergoing
chemotherapy for the first time. Which research design is most appropriate for this
objective?
A. Grounded Theory
B. Quasi-experimental
C. Ethnography
D. Phenomenology
Answer: D
Conceptual Explanation: Phenomenology is the study of the lived experience and the
meaning of phenomena to individuals.
2. Which of the following describes a Type II error in quantitative research?
A. The researcher fails to reject a false null hypothesis.
B. The researcher rejects a true null hypothesis.
C. The researcher uses a sample size that is too large.
,D. The researcher applies an incorrect statistical test.
Answer: A
Conceptual Explanation: A Type II error (beta) occurs when the researcher concludes no
relationship exists when one actually does.
3. In a study assessing the impact of a new hand-washing protocol on infection rates, the
infection rate represents which variable?
A. Independent variable
B. Extraneous variable
C. Dependent variable
D. Confounding variable
Answer: C
Conceptual Explanation: The dependent variable is the outcome or effect that the
researcher is interested in measuring.
4. A nurse researcher uses a method of sampling where every member of the population has
an equal and independent chance of being selected. This is known as:
A. Convenience sampling
B. Purposive sampling
C. Simple random sampling
D. Snowball sampling
, Answer: C
Conceptual Explanation: Simple random sampling is a probability sampling method that
ensures every element has an equal chance of selection.
5. The nurse is reviewing a research article that uses a Likert scale to measure patient
satisfaction. This is an example of which level of measurement?
A. Nominal
B. Ratio
C. Interval
D. Ordinal
Answer: D
Conceptual Explanation: Likert scales are considered ordinal because they represent a
rank order, although the distance between points is not mathematically equal.
6. What is the primary purpose of an Institutional Review Board (IRB)?
A. To protect the rights and welfare of human subjects.
B. To ensure the study findings are statistically significant.
C. To verify the credentials of the lead researcher.
D. To provide funding for clinical research projects.
Answer: A
