MCQs

11212 questions found

Practice Questions

182. The technical acronym “ANOVA” stands for:

A. Analysis of Variables.
B. Analysis of Variance.
C. Analysis of Values.
D. Analysis of Variation.
nmdcat.online BS Nursing
Jun 6, 2026

181. A critical situational public health agency is presented with a report claiming a strong correlation between two variables, but the scatter plot shows a highly non-linear relationship. What is the urgency for a biostatistician’s clarification?

A. To accept the strong correlation as is.
B. To urgently explain that Pearson's correlation coefficient only measures linear association, and a non-linear relationship might be missed or misinterpreted.
C. To ignore the scatter plot.
D. To assume all relationships are linear.
nmdcat.online BS Nursing
Jun 6, 2026
nmdcat.online BS Nursing
Jun 6, 2026

178. What technical term describes variables that can take on any value within a given range?

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

177. A critical situational clinical trial reports that a new drug is effective but the outcome measure was assessed subjectively by unblinded clinicians. What is the urgency for a biostatistician to advise caution?

A. To immediately accept the results.
B. To urgently highlight the potential for observer bias and the need for objective outcome measures or blinded assessment to ensure validity.
C. To disregard the p-value.
D. To assume clinician assessment is always objective.
nmdcat.online BS Nursing
Jun 6, 2026

174. The technical equation for a simple linear regression model is typically written as Y=?0?+?1?X+?. What does ?1? represent?

A. The intercept.
B. The error term.
C. The predicted value of Y.
D. The slope, representing the change in Y for a one-unit change in X.
nmdcat.online BS Nursing
Jun 6, 2026

173. A critical situational public health campaign reports that a new intervention increased a desired outcome from 5% to 10%, with a p-value of 0.001. What is the urgency for a biostatistician to highlight both relative and absolute differences?

A. To only focus on the p-value.
B. To urgently explain that while statistically significant, the absolute increase is only 5 percentage points, which might be less impressive than the relative increase, and to frame findings transparently.
C. To ignore the absolute difference.
D. To assume all significant findings are large.
nmdcat.online BS Nursing
Jun 6, 2026

170. What technical term describes a numerical summary calculated from sample data?

A. Parameter.
B. Population.
C. Statistic.
D. Hypothesis.
nmdcat.online BS Nursing
Jun 6, 2026

169. A critical situational clinical trial protocol describes using an unvalidated questionnaire to measure a key patient outcome. What is the urgency for a biostatistician’s intervention?

A. To accept the questionnaire as is.
B. To urgently advise that an unvalidated instrument can lead to unreliable and invalid data, compromising the study's conclusions, and to recommend using a validated tool.
C. To only focus on the sample size.
D. To assume the questionnaire is good.
nmdcat.online BS Nursing
Jun 6, 2026

168. A medicinal study reports a 95% confidence interval for the mean treatment effect as (2.0,5.0). What critical interpretation can be made regarding the null hypothesis of no effect?

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

166. What technical term describes a measure of association between two variables that ranges from -1 to +1?

A. P-value.
B. T-statistic.
C. Correlation coefficient.
D. Regression coefficient.
nmdcat.online BS Nursing
Jun 6, 2026

165. A critical situational public health report on the effectiveness of a vaccination program relies solely on the proportion of vaccinated individuals who did not get sick. What is the urgency for a biostatistician to advise caution?

A. To immediately celebrate the program's success.
B. To urgently explain that this is a misleading metric and that a proper comparison with unvaccinated individuals or a calculation of vaccine effectiveness is critically needed.
C. To ignore the unvaccinated group.
D. To assume correlation implies effectiveness.
nmdcat.online BS Nursing
Jun 6, 2026
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