NURS 5366 Module 3 Exam V3 | NURS
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 3 Exam) | The University of Texas
at Arlington
1. Which sampling method is considered the strongest for ensuring representativeness and
generalizability in quantitative research?
A. Convenience sampling
B. Purposive sampling
C. Quota sampling
D. Simple random sampling
Answer: D
Rationale: Simple random sampling is a probability sampling technique where every
member of the population has an equal chance of being selected. This method minimizes
selection bias and is the most effective way to ensure that the sample reflects the
population. Researchers use this technique to increase the external validity of their study
findings.
2. A researcher is measuring the ‘time spent in physical activity’ in minutes. Which level of
measurement does this represent?
A. Ratio
,B. Ordinal
C. Interval
D. Nominal
Answer: A
Rationale: The Ratio level of measurement is characterized by having an absolute zero
point, meaning that zero minutes indicates a total absence of physical activity. In addition
to a true zero, this level allows for the comparison of magnitudes, such as saying one
person exercised twice as long as another. Most physiological and physical data in nursing
research fall into this category.
3. Which of the following describes the degree to which an instrument measures what it is
intended to measure?
A. Reliability
B. Validity
C. Homogeneity
D. Stability
Answer: B
Rationale: Validity is the extent to which a research tool accurately captures the concept it
was designed to evaluate. It differs from reliability because a tool can be consistent
, (reliable) without being accurate (valid). Researchers must establish evidence of validity to
ensure the integrity of their data collection processes.
4. A nursing student is using a Cronbach’s alpha to assess a new survey instrument. A
coefficient of 0.85 indicates which of the following?
A. Poor external validity
B. Low equivalence
C. Strong test-retest reliability
D. High internal consistency
Answer: D
Rationale: A Cronbach’s alpha of 0.85 signifies High internal consistency, suggesting that
the items within the instrument are highly correlated and measure the same construct.
Typically, a value above 0.70 is considered acceptable for new instruments, while 0.80 or
higher is preferred for established ones. This statistic helps researchers determine if the
subparts of an instrument are reliable.
5. Which type of sampling is most susceptible to researcher bias and limits the
generalizability of findings?
A. Stratified random sampling
B. Systematic sampling
C. Cluster sampling
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 3 Exam) | The University of Texas
at Arlington
1. Which sampling method is considered the strongest for ensuring representativeness and
generalizability in quantitative research?
A. Convenience sampling
B. Purposive sampling
C. Quota sampling
D. Simple random sampling
Answer: D
Rationale: Simple random sampling is a probability sampling technique where every
member of the population has an equal chance of being selected. This method minimizes
selection bias and is the most effective way to ensure that the sample reflects the
population. Researchers use this technique to increase the external validity of their study
findings.
2. A researcher is measuring the ‘time spent in physical activity’ in minutes. Which level of
measurement does this represent?
A. Ratio
,B. Ordinal
C. Interval
D. Nominal
Answer: A
Rationale: The Ratio level of measurement is characterized by having an absolute zero
point, meaning that zero minutes indicates a total absence of physical activity. In addition
to a true zero, this level allows for the comparison of magnitudes, such as saying one
person exercised twice as long as another. Most physiological and physical data in nursing
research fall into this category.
3. Which of the following describes the degree to which an instrument measures what it is
intended to measure?
A. Reliability
B. Validity
C. Homogeneity
D. Stability
Answer: B
Rationale: Validity is the extent to which a research tool accurately captures the concept it
was designed to evaluate. It differs from reliability because a tool can be consistent
, (reliable) without being accurate (valid). Researchers must establish evidence of validity to
ensure the integrity of their data collection processes.
4. A nursing student is using a Cronbach’s alpha to assess a new survey instrument. A
coefficient of 0.85 indicates which of the following?
A. Poor external validity
B. Low equivalence
C. Strong test-retest reliability
D. High internal consistency
Answer: D
Rationale: A Cronbach’s alpha of 0.85 signifies High internal consistency, suggesting that
the items within the instrument are highly correlated and measure the same construct.
Typically, a value above 0.70 is considered acceptable for new instruments, while 0.80 or
higher is preferred for established ones. This statistic helps researchers determine if the
subparts of an instrument are reliable.
5. Which type of sampling is most susceptible to researcher bias and limits the
generalizability of findings?
A. Stratified random sampling
B. Systematic sampling
C. Cluster sampling
