Practice Questions

125. The interquartile range technically measures the spread of the:

A. Entire dataset.
B. Middle 50% of the data.
C. Top 25% of the data.
D. Bottom 25% of the data.
nmdcat.online BS Nursing
Jun 6, 2026

122. When a researcher rejects the null hypothesis when it is actually true, this is a:

A. Type II error.
B. Correct decision.
C. Type I error.
D. Power.
nmdcat.online BS Nursing
Jun 6, 2026
nmdcat.online BS Nursing
Jun 6, 2026

120. A technical value that describes a specific characteristic of a population is called a:

A. Statistic.
B. Sample.
C. Parameter.
D. Hypothesis.
nmdcat.online BS Nursing
Jun 6, 2026

119. A critical situational review of a clinical trial protocol reveals that the primary outcome measure is difficult to assess consistently. What is the urgency for a biostatistician’s intervention?

A. To proceed with the trial as is.
B. To urgently recommend revising or replacing the outcome measure to ensure reliable and valid data collection, crucial for the integrity of the results.
C. To ignore measurement issues.
D. To tell the clinicians to be more careful.
nmdcat.online BS Nursing
Jun 6, 2026
nmdcat.online BS Nursing
Jun 6, 2026

115. A critical situational decision needs to be made about funding a large-scale randomized controlled trial for a new cancer therapy. Preliminary data shows promising but not statistically significant results, and the biostatistician highlights the preliminary trial’s low power. What is the urgency for further investment?

A. To immediately abandon the therapy.
B. To urgently consider the implications of low power (high risk of Type II error) and the need for a larger, adequately powered trial before discarding a potentially beneficial therapy.
C. To fund a smaller, less expensive trial.
D. To rely solely on the current non-significant p-value.
nmdcat.online BS Nursing
Jun 6, 2026
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