A nurse wants to compare the proportions of immunised and unimmunised children in one rural health centre. Which display is most appropriate?
Correct answer: A. Pie chart
- A. Pie chart
- B. Scatter plot
- C. Histogram
- D. Line graph
Explanation
A pie chart shows how categories make up parts of a whole, such as immunised and unimmunised children. A histogram is used for continuous numerical data, while a scatter plot examines relationships between two numerical variables.
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About Epidemiology and Biostatistics
Epidemiology examines the distribution and causes of disease by person, place and time, using measures such as incidence, prevalence, mortality and case-fatality rates. Biostatistics covers data presentation, sampling, averages, variability, probability and interpretation of study results, while distinguishing association from causation.
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