MCQs

11212 questions found

Practice Questions

162. The technical concept of “degrees of freedom” in statistical tests relates to:

A. The number of variables in the study.
B. The number of observations in the sample minus the number of parameters estimated.
C. The significance level.
D. The power of the test.
nmdcat.online BS Nursing
Jun 6, 2026

161. A critical situational clinical trial is experiencing higher than expected dropout rates from the control group. What is the urgency for a biostatistician to assess the impact?

A. To ignore the dropouts as normal.
B. To urgently assess if the dropout is differential (related to outcome or treatment), as this can introduce selection bias and invalidate the study results.
C. To only analyze complete cases.
D. To recruit more participants.
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.
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.
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.
nmdcat.online BS Nursing
Jun 6, 2026
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.
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.
nmdcat.online BS Nursing
Jun 6, 2026

150. In biostatistics, technical variables that can only take on a finite number of values or a countably infinite number of values are called:

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

146. What technical term describes the average of a set of numbers?

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