NSG 526 – Midterm Exam Questions
& Verified Answers with Rationale
Latest Edition 2026/2027
Question 1
What is the primary role of the advanced practice registered
nurse (APRN) when translating current research evidence into
clinical nursing practice?
A. To design randomized controlled trials for
pharmaceutical companies
B. To critically appraise available evidence and integrate
research findings with clinical expertise and patient
preferences
C. To replace traditional physician-led diagnostic protocols
entirely
D. To manage hospital billing and reimbursement
procedures
CORRECT ANSWER: B
RATIONALE: Evidence-based practice requires the APRN to
critically evaluate empirical research and combine it with
clinical judgment and patient values to guide safe, effective
healthcare decisions.
Question 2
,When evaluating the reliability of a clinical measurement
instrument in a research study, what does a high Cronbach alpha
coefficient (e.g., above 0.85) primarily indicate?
A. High internal consistency and homogeneity among the
test items
B. High test-retest stability over extended periods of time
C. Low inter-rater variability across different observers
D. Absence of systematic measurement bias
CORRECT ANSWER: A
RATIONALE: Cronbach alpha is the standard statistical metric
used to measure internal consistency reliability, reflecting how
closely related a set of test items are as a group.
Question 3
What is the primary purpose of conducting an a priori power
analysis prior to initiating a quantitative nursing research study?
A. To calculate the final financial budget required for data
collection
B. To determine the minimum sample size necessary to
detect a statistically significant effect if one truly exists
C. To test the reliability of laboratory equipment
D. To eliminate all confounding variables from the research
design
CORRECT ANSWER: B
,RATIONALE: A priori power analysis helps researchers
determine the appropriate sample size needed to avoid Type II
errors, ensuring the study has adequate statistical power.
Question 4
In epidemiological and clinical research, what distinguishes a
retrospective cohort study from a case-control study?
A. Cohort studies start by classifying participants based on
exposure status and follow them forward or look back at
exposure to assess outcomes, whereas case-control studies
start with the outcome (cases vs. controls) and look
backward to determine past exposures
B. Cohort studies are qualitative, while case-control studies
are purely quantitative
C. Case-control studies always prove direct causation,
whereas cohort studies only show correlation
D. Cohort studies can only be conducted in laboratory
settings
CORRECT ANSWER: A
RATIONALE: The fundamental methodological difference lies
in the starting point: cohort studies group participants by
exposure, while case-control studies group them by disease or
outcome status.
Question 5
Which ethical principle in human subjects research obligates the
investigator to maximize potential benefits while minimizing
possible harms to study participants?
, A. Autonomy
B. Justice
C. Beneficence
D. Veracity
CORRECT ANSWER: C
RATIONALE: The principle of beneficence mandates that
researchers protect participants from harm by securing their
well-being and maximizing benefits while minimizing risks.
Question 6
When analyzing skewed continuous data in clinical research,
which measure of central tendency is generally most appropriate
to report?
A. Mean
B. Median
C. Mode
D. Standard deviation
CORRECT ANSWER: B
RATIONALE: Extreme outliers heavily distort the arithmetic
mean in skewed distributions, making the median a more stable
and accurate representative of central tendency.
Question 7
What is the primary advantage of utilizing a double-blind
randomized controlled trial (RCT) in healthcare research?
A. It completely eliminates all human error in data entry
& Verified Answers with Rationale
Latest Edition 2026/2027
Question 1
What is the primary role of the advanced practice registered
nurse (APRN) when translating current research evidence into
clinical nursing practice?
A. To design randomized controlled trials for
pharmaceutical companies
B. To critically appraise available evidence and integrate
research findings with clinical expertise and patient
preferences
C. To replace traditional physician-led diagnostic protocols
entirely
D. To manage hospital billing and reimbursement
procedures
CORRECT ANSWER: B
RATIONALE: Evidence-based practice requires the APRN to
critically evaluate empirical research and combine it with
clinical judgment and patient values to guide safe, effective
healthcare decisions.
Question 2
,When evaluating the reliability of a clinical measurement
instrument in a research study, what does a high Cronbach alpha
coefficient (e.g., above 0.85) primarily indicate?
A. High internal consistency and homogeneity among the
test items
B. High test-retest stability over extended periods of time
C. Low inter-rater variability across different observers
D. Absence of systematic measurement bias
CORRECT ANSWER: A
RATIONALE: Cronbach alpha is the standard statistical metric
used to measure internal consistency reliability, reflecting how
closely related a set of test items are as a group.
Question 3
What is the primary purpose of conducting an a priori power
analysis prior to initiating a quantitative nursing research study?
A. To calculate the final financial budget required for data
collection
B. To determine the minimum sample size necessary to
detect a statistically significant effect if one truly exists
C. To test the reliability of laboratory equipment
D. To eliminate all confounding variables from the research
design
CORRECT ANSWER: B
,RATIONALE: A priori power analysis helps researchers
determine the appropriate sample size needed to avoid Type II
errors, ensuring the study has adequate statistical power.
Question 4
In epidemiological and clinical research, what distinguishes a
retrospective cohort study from a case-control study?
A. Cohort studies start by classifying participants based on
exposure status and follow them forward or look back at
exposure to assess outcomes, whereas case-control studies
start with the outcome (cases vs. controls) and look
backward to determine past exposures
B. Cohort studies are qualitative, while case-control studies
are purely quantitative
C. Case-control studies always prove direct causation,
whereas cohort studies only show correlation
D. Cohort studies can only be conducted in laboratory
settings
CORRECT ANSWER: A
RATIONALE: The fundamental methodological difference lies
in the starting point: cohort studies group participants by
exposure, while case-control studies group them by disease or
outcome status.
Question 5
Which ethical principle in human subjects research obligates the
investigator to maximize potential benefits while minimizing
possible harms to study participants?
, A. Autonomy
B. Justice
C. Beneficence
D. Veracity
CORRECT ANSWER: C
RATIONALE: The principle of beneficence mandates that
researchers protect participants from harm by securing their
well-being and maximizing benefits while minimizing risks.
Question 6
When analyzing skewed continuous data in clinical research,
which measure of central tendency is generally most appropriate
to report?
A. Mean
B. Median
C. Mode
D. Standard deviation
CORRECT ANSWER: B
RATIONALE: Extreme outliers heavily distort the arithmetic
mean in skewed distributions, making the median a more stable
and accurate representative of central tendency.
Question 7
What is the primary advantage of utilizing a double-blind
randomized controlled trial (RCT) in healthcare research?
A. It completely eliminates all human error in data entry
