Practice Questions

What is the “p-value” in statistical hypothesis testing?

A. The probability that the alternative hypothesis is true.
B. The probability of obtaining observed results (or more extreme) if the null hypothesis is true.
C. The effect size of the intervention.
D. The sample size.
nmdcat.online BS Nursing
Jun 6, 2026

A nurse is developing a research question using the PICO format. What does “C” represent?

A. Complications
B. Control
C. Comparison
D. Current
nmdcat.online BS Nursing
Jun 6, 2026

What is the purpose of “random sampling” in research?

A. To make the study easier to conduct.
B. To ensure that every member of the population has an equal chance of being selected, increasing representativeness.
C. To select participants based on specific characteristics.
D. To reduce the cost of research.
nmdcat.online BS Nursing
Jun 6, 2026

What is a “cohort study”?

A. A study that follows a group of individuals over time to observe the development of a disease or outcome.
B. A study that compares individuals with a disease to those without.
C. A study that collects data at a single point in time.
D. An experimental study with random assignment.
nmdcat.online BS Nursing
Jun 6, 2026
nmdcat.online BS Nursing
Jun 6, 2026

What is the meaning of “clinical significance” in the context of a new drug’s effectiveness?

A. The drug has a statistically significant effect.
B. The drug's effect is large enough to be meaningful and beneficial in real-world patient care.
C. The drug is safe for all patients.
D. The drug is approved by regulatory bodies.
nmdcat.online BS Nursing
Jun 6, 2026

What is the “null hypothesis”?

A. A statement that predicts a relationship between variables.
B. A statement that there is no relationship or difference between variables.
C. The researcher's personal opinion.
D. The main finding of the study.
nmdcat.online BS Nursing
Jun 6, 2026
nmdcat.online BS Nursing
Jun 6, 2026

What is the ethical principle of “non-maleficence”?

A. To do good and maximize benefits.
B. To do no harm or minimize harm.
C. To treat all participants fairly.
D. To respect participants' autonomy.
nmdcat.online BS Nursing
Jun 6, 2026
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