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Introduction To Biostatistics

195 questions found

Practice Questions

117. In a clinical study, researchers collect data on patient weight (in kg) and height (in cm). To standardize these measurements for comparison across different studies, they might calculate a patient’s:

A. Mean.

B. Median.

C. Z-score. ✓

D. Mode.

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nmdcat.online BS Nursing

Jun 6, 2026

118. A medicinal study aims to understand the relationship between a patient’s age and the amount of drug metabolized per hour. Which technical regression model would be most appropriate?

A. Logistic regression.

B. Simple linear regression. ✓

C. Poisson regression.

D. Survival regression.

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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.

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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.

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nmdcat.online BS Nursing

Jun 6, 2026

121. A situational public health researcher wants to compare the proportion of unvaccinated children in two different school districts. Which technical statistical test is most appropriate?

A. Independent samples t-test.

B. Paired t-test.

C. Chi-square test of independence. ✓

D. One-way ANOVA.

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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.

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nmdcat.online BS Nursing

Jun 6, 2026

123. A medicinal study reports that the incidence of a rare adverse event is 0.001 (or 1 in 1000). Which technical distribution is often used to model rare events occurring in a fixed interval of time or space?

A. Normal distribution.

B. Binomial distribution.

C. Poisson distribution. ✓

D. Exponential distribution.

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nmdcat.online BS Nursing

Jun 6, 2026

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.

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nmdcat.online BS Nursing

Jun 6, 2026

111. A situational public health researcher is comparing the number of doctor visits per year for two different patient groups. What technical type of data is ‘number of doctor visits’?

A. Nominal.

B. Ordinal.

C. Continuous.

D. Discrete. ✓

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nmdcat.online BS Nursing

Jun 6, 2026

112. The range of values within which a population parameter is estimated to lie, with a certain level of confidence, is called a:

A. Point estimate.

B. P-value.

C. Confidence interval. ✓

D. Standard error.

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nmdcat.online BS Nursing

Jun 6, 2026

113. In a clinical study, researchers are investigating the association between a patient’s education level (e.g., high school, college, graduate) and their adherence to medication (e.g., low, medium, high). Which technical test is most appropriate for these ordinal categorical variables?

A. Independent samples t-test.

B. Paired t-test.

C. Chi-square test.

D. Spearman's rank correlation or a non-parametric test for association. ✓

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nmdcat.online BS Nursing

Jun 6, 2026

114. A medicinal study reports a highly precise estimate (narrow confidence interval) but the study design had significant flaws leading to bias. What critical biostatistical concern is more important than precision in this scenario?

A. Statistical significance.

B. Clinical significance.

C. Accuracy (lack of bias) over precision. ✓

D. Power of the study.

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nmdcat.online BS Nursing

Jun 6, 2026

98. A medicinal study is designed to show that a new drug is better than an existing one. What technical type of hypothesis test is being performed?

A. Non-inferiority test.

B. Equivalence test.

C. Superiority test. ✓

D. Association test.

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nmdcat.online BS Nursing

Jun 6, 2026

99. A critical situational decision needs to be made about whether to roll out a new public health intervention. Initial data shows a positive trend, but the sample size is small, and the p-value is only 0.07. What urgency is involved in further evaluation?

A. To immediately implement the intervention.

B. To recognize that a p-value of 0.07 is not statistically significant at the 0.05 level, and further data or a larger study is urgently needed to make a definitive decision. ✓

C. To ignore the p-value and proceed.

D. To assume the trend will continue.

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nmdcat.online BS Nursing

Jun 6, 2026