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Practice Questions

52. In a clinical study, researchers want to model the probability of developing a certain disease based on multiple risk factors (e.g., age, smoking status, family history). Which technical regression model is most appropriate for a binary outcome (disease/no disease)?

A. Simple linear regression.
B. Multiple linear regression.
C. Multiple logistic regression. ✓
D. Poisson regression.
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nmdcat.online BS Nursing
Jun 6, 2026

51. What technical term describes a graphical representation of the distribution of a continuous variable, where data are grouped into bins?

A. Bar chart.
B. Pie chart.
C. Histogram. ✓
D. Scatter plot.
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nmdcat.online BS Nursing
Jun 6, 2026

50. A critical situational decision needs to be made about whether to continue a clinical trial for a new drug that has shown very small, but statistically significant, benefits in early analyses. What urgency is involved in considering both statistical and clinical significance?

A. To immediately stop the trial because of small benefits.
B. To weigh the statistical significance against the clinical relevance and potential harms, recognizing that a statistically significant effect may not be clinically meaningful. ✓
C. To continue the trial regardless of clinical significance.
D. To only consider the p-value.
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nmdcat.online BS Nursing
Jun 6, 2026

49. In hypothesis testing, what technical term represents the hypothesis that there is no effect or no difference?

A. Alternative hypothesis.
B. Research hypothesis.
C. Null hypothesis. ✓
D. Statistical hypothesis.
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nmdcat.online BS Nursing
Jun 6, 2026

48. A situational research project involves measuring the height of students in a class. What technical type of variable is height?

A. Nominal.
B. Ordinal.
C. Discrete.
D. Continuous. ✓
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nmdcat.online BS Nursing
Jun 6, 2026

47. A medicinal study reports a confidence interval for the mean treatment effect as (0.1,0.5). What is the critical interpretation regarding the null hypothesis of no effect?

A. The null hypothesis of no effect is likely true.
B. The null hypothesis of no effect can be rejected because the interval does not include zero. ✓
C. The drug is harmful.
D. The confidence interval is too wide.
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nmdcat.online BS Nursing
Jun 6, 2026

46. A clinical researcher is conducting a study where each patient serves as their own control (e.g., measuring blood pressure before and after treatment for each patient). Which technical statistical test is most appropriate for comparing the ‘before’ and ‘after’ measurements?

A. Independent samples t-test.
B. Paired t-test. ✓
C. Chi-square test.
D. One-way ANOVA.
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nmdcat.online BS Nursing
Jun 6, 2026

45. What technical term describes the value that divides a dataset into two equal halves, when the data are ordered from least to greatest?

A. Mean.
B. Mode.
C. Median. ✓
D. Standard deviation.
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nmdcat.online BS Nursing
Jun 6, 2026

44. A situational public health researcher wants to compare the mean birth weight of infants born to mothers in two different socioeconomic groups. Which technical statistical test is most appropriate?

A. Paired t-test.
B. Chi-square test.
C. Independent samples t-test. ✓
D. One-way ANOVA.
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nmdcat.online BS Nursing
Jun 6, 2026

43. A medicinal study is testing a new drug for a rare disease. What critical challenge does the rarity of the disease pose for sample size calculation?

A. It makes it easier to recruit participants.
B. It often necessitates a very large sample size to detect a meaningful effect, which can be challenging to achieve. ✓
C. Sample size is irrelevant for rare diseases.
D. It means the drug will always be effective.
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nmdcat.online BS Nursing
Jun 6, 2026
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