Practice Questions

What is “power” in the context of a statistical test?

A. The probability of making a Type I error.
B. The probability of making a Type II error.
C. The probability of correctly rejecting a false null hypothesis.
D. The sample size required for the study.
nmdcat.online BS Nursing
Jun 6, 2026

A research study uses a “double-blind” approach. What does this mean?

A. Both the researchers and the participants are unaware of the treatment assignments.
B. Only the participants are unaware of their treatment assignment.
C. Only the researchers are unaware of the treatment assignments.
D. The study is reviewed by two independent committees.
nmdcat.online BS Nursing
Jun 6, 2026

What is the primary purpose of a “research hypothesis”?

A. To provide background information on the topic.
B. To predict the expected relationship between variables.
C. To summarize the study's findings.
D. To list the ethical considerations.
nmdcat.online BS Nursing
Jun 6, 2026

When critically appraising a qualitative study, what does “trustworthiness” encompass?

A. Reliability, validity, generalizability.
B. Credibility, transferability, dependability, confirmability.
C. Statistical significance, clinical significance.
D. Randomization, blinding.
nmdcat.online BS Nursing
Jun 6, 2026

A nurse researcher is planning to conduct a study on the experiences of nurses working in rural areas. They plan to use purposive sampling. What is the main characteristic of purposive sampling?

A. Every member of the population has an equal chance of being selected.
B. Participants are selected based on specific characteristics relevant to the research question.
C. Participants are chosen randomly from a list.
D. The first available participants are selected.
nmdcat.online BS Nursing
Jun 6, 2026

In a research study, what does “sampling bias” refer to?

A. Errors in data analysis.
B. A systematic difference between the sample and the population.
C. A preference for qualitative research designs.
D. The unintentional influence of the researcher on participants.
nmdcat.online BS Nursing
Jun 6, 2026

A nurse researcher is using a “pretest-posttest design” to evaluate the effectiveness of a patient education program. What is the primary purpose of the pretest?

A. To provide baseline data for comparison.
B. To introduce participants to the intervention.
C. To ensure participants understand the study.
D. To collect demographic information.
nmdcat.online BS Nursing
Jun 6, 2026
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