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Practice Questions

73. A clinical researcher wants to model the relationship between a patient’s age (continuous) and their systolic blood pressure (continuous). Which technical regression model is most appropriate?

A. Logistic regression.
B. Simple linear regression. ✓
C. Poisson regression.
D. Multiple linear regression.
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Jun 6, 2026

72. What technical term describes a measure of the average squared deviation of data points from the mean?

A. Standard deviation.
B. Range.
C. Variance. ✓
D. Interquartile range.
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71. A situational pharmaceutical company is conducting a pre-clinical study to compare the mean drug concentration in animal tissues after administration of two different formulations. Which technical statistical test is appropriate?

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

69. A clinical study aims to determine if a new treatment reduces the median survival time of patients. Which technical non-parametric test is most appropriate if the data are not normally distributed?

A. Independent samples t-test.
B. Paired t-test.
C. Mann-Whitney U test (or Wilcoxon rank-sum test). ✓
D. ANOVA.
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Jun 6, 2026

68. The probability of observing a result as extreme as, or more extreme than, the one observed, assuming the null hypothesis is true, is defined as the:

A. Significance level.
B. Confidence level.
C. Power.
D. P-value. ✓
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Jun 6, 2026

67. A situational public health professional needs to understand the variability in patient recovery times after a specific surgery. Which measure of dispersion is most commonly used and provides information about the average distance of data points from the mean?

A. Range.
B. Interquartile range.
C. Standard deviation. ✓
D. Mode.
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Jun 6, 2026

66. A medicinal study needs to detect a small but clinically meaningful difference between two treatments. What critical implication does this have for the statistical power of the study?

A. High power is not necessary.
B. High statistical power (e.g., 80% or 90%) is critically needed. ✓
C. The power should be as low as possible.
D. Power is only relevant for large differences.
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mintcream-chough-797767.hostingersite.com BS Nursing
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65. In a clinical study, patients are weighed to the nearest kilogram. What technical type of variable is weight?

A. Nominal.
B. Ordinal.
C. Discrete.
D. Continuous. ✓
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Jun 6, 2026

64. What technical distribution is characterized by a bell-shaped curve and is symmetric around its mean?

A. Binomial distribution.
B. Poisson distribution.
C. Normal distribution. ✓
D. Uniform distribution.
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Jun 6, 2026

63. A situational researcher wants to display the proportion of a patient population categorized by disease stage (Stage I, II, III, IV). Which technical graphical display is most appropriate?

A. Histogram.
B. Scatter plot.
C. Pie chart or bar chart. ✓
D. Line graph.
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