Practice Questions

nmdcat.online BS Nursing
Jun 6, 2026

20. In a critical situational context, a research paper reports a new finding, but the methods section indicates that the researchers selected participants in a way that might introduce bias. What is the urgency for a biostatistician reviewing this paper?

A. To immediately accept the findings.
B. To critically evaluate the potential for selection bias and its impact on the validity of the results.
C. To ignore the methods and focus only on the p-value.
D. To ask the researchers to collect more data.
nmdcat.online BS Nursing
Jun 6, 2026

19. A medicinal researcher sets a significance level (alpha) of 0.05 for their hypothesis test. What is the technical meaning of this alpha level?

A. The probability of making a Type II error.
B. The probability of correctly rejecting the null hypothesis.
C. The maximum acceptable probability of making a Type I error (false positive).
D. The power of the test.
nmdcat.online BS Nursing
Jun 6, 2026
nmdcat.online BS Nursing
Jun 6, 2026

15. A medicinal study finds a strong correlation between increasing drug dose and decreasing tumor size. However, the study design was purely observational. What is the critical biostatistical caution when interpreting this finding?

A. Correlation implies causation.
B. The correlation is likely due to chance.
C. Correlation does not imply causation; confounding or other factors may be at play.
D. The study was poorly designed.
nmdcat.online BS Nursing
Jun 6, 2026
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