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Introduction To Biostatistics

195 questions found

Practice Questions

163. In a clinical study, researchers are interested in comparing the mean recovery times (continuous) among patients who received one of three different types of surgery. Which technical statistical test is most appropriate?

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

164. A medicinal study investigates the relationship between the dose of a drug (continuous) and the presence of a specific side effect (yes/no). Which technical regression model is most appropriate?

A. Linear regression.

B. Logistic regression. ✓

C. Poisson regression.

D. Survival regression.

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nmdcat.online BS Nursing

Jun 6, 2026

151. A clinical trial involves measuring patients’ cholesterol levels before and after receiving a new dietary supplement. Which technical statistical test is most appropriate for comparing the ‘before’ and ‘after’ mean cholesterol levels in the same group of patients?

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

152. A medicinal study is testing a new drug. The alternative hypothesis states that the new drug increases the mean blood pressure. What technical type of hypothesis test is this?

A. Two-tailed test.

B. One-tailed (right-tailed) test. ✓

C. One-tailed (left-tailed) test.

D. Non-directional test.

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nmdcat.online BS Nursing

Jun 6, 2026

153. A critical situational research project involves using pre-existing administrative data for analysis. The biostatistician notes that the data collection methods were not standardized. What is the urgency for concern?

A. To use the data without any changes.

B. To urgently highlight potential for information bias due to inconsistent data collection and to develop strategies to assess and mitigate this bias. ✓

C. To assume data are perfect.

D. To only analyze a subset of the data.

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nmdcat.online BS Nursing

Jun 6, 2026

154. What technical term describes a graph that uses rectangles to represent the frequency of data in different categories?

A. Histogram.

B. Scatter plot.

C. Bar chart. ✓

D. Line graph.

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nmdcat.online BS Nursing

Jun 6, 2026

155. In a clinical study, researchers are measuring patient temperature (in Celsius). What technical type of data is temperature?

A. Nominal.

B. Ordinal.

C. Interval. ✓

D. Ratio.

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nmdcat.online BS Nursing

Jun 6, 2026

156. A medicinal study aims to determine if a new drug is equivalent to an existing drug. What technical type of hypothesis test is typically used?

A. Superiority test.

B. Non-inferiority test.

C. Equivalence test. ✓

D. Association test.

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nmdcat.online BS Nursing

Jun 6, 2026

157. A critical situational public health official needs to interpret the results of a study that reports a high correlation coefficient between two variables, but one of the variables is prone to significant measurement error. What is the urgency for a biostatistician’s advice?

A. To assume the correlation is accurate.

B. To urgently explain that measurement error can attenuate (reduce) the observed correlation, potentially masking a stronger true relationship. ✓

C. To ignore the measurement error.

D. To only focus on the correlation coefficient.

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nmdcat.online BS Nursing

Jun 6, 2026

158. What technical term describes the process of systematically organizing and summarizing data?

A. Inferential statistics.

B. Descriptive statistics. ✓

C. Hypothesis testing.

D. Sampling.

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nmdcat.online BS Nursing

Jun 6, 2026

159. A clinical trial compares the mean reduction in symptom severity score for two different drug groups. If the outcome variable is continuous and normally distributed, and the groups are independent, which technical statistical test is most appropriate?

A. Paired t-test.

B. Independent samples t-test. ✓

C. Chi-square test.

D. One-way ANOVA.

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nmdcat.online BS Nursing

Jun 6, 2026

160. A medicinal study aims to show that a new drug reduces cholesterol levels. The alternative hypothesis states that the new drug reduces the mean cholesterol level. What technical type of hypothesis test is this?

A. Two-tailed test.

B. One-tailed (right-tailed) test.

C. One-tailed (left-tailed) test. ✓

D. Non-directional test.

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nmdcat.online BS Nursing

Jun 6, 2026

149. A critical situational decision needs to be made about public health resource allocation based on a study that used a convenience sample rather than a random sample. What is the urgency for a biostatistician’s caution?

A. To immediately allocate resources based on the study.

B. To urgently explain that convenience samples may not be representative of the population, leading to biased estimates and potentially ineffective interventions. ✓

C. To ignore the sampling method.

D. To assume all samples are representative.

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nmdcat.online BS Nursing

Jun 6, 2026