,1. Which of the following biostatistical methods is most
appropriate for assessing the relationship between a
categorical independent variable and a continuous
dependent variable?
- A) Logistic Regression
- B) Chi-Square Test
- C) ANOVA
- D) Cox Proportional Hazards Model
Answer: C) ANOVA
Rationale : ANOVA (Analysis of Variance) is used to
compare the means of a continuous dependent variable
across different categories of an independent variable.
2. In evidence-based practice, what is the primary
advantage of using a meta-analysis?
- A) It allows for in-depth analysis of a single study.
- B) It reduces heterogeneity between study outcomes.
- C) It increases the statistical power by combining data
from multiple studies.
- D) It eliminates the need for primary research.
Answer: C) It increases the statistical power by
combining data from multiple studies.
Rationale : Meta-analysis increases power and
improves estimates of the size of the effect due to
aggregated data from several studies.
, - B) Kaplan-Meier method
- C) Pearson correlation
- D) McNemar’s test
Answer: B) Kaplan-Meier method
Rationale : The Kaplan-Meier method is a non-
parametric statistic used to estimate the survival function
from lifetime data.
4. In a normal distribution, what percentage of data falls
within ±2 standard deviations from the mean?
- A) 50%
- B) 68%
- C) 95%
- D) 99.7%
Answer: C) 95%
Rationale : According to the empirical rule in a normal
distribution, about 95% of the data falls within ±2 standard
deviations of the mean.
5. Which is an appropriate method to handle missing data in
a dataset when applying biostatistical methods?
- A) Data duplication
- B) Listwise deletion
- C) Segment elimination
- D) Variable omission
Answer: B) Listwise deletion
Rationale : Listwise deletion is a common method for
handling missing data, removing rows with any missing
values for the analysis.
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