A nurse wants to examine whether height and weight are related among schoolchildren. Which display is most appropriate?
Correct answer: A. Scatter diagram
- A. Scatter diagram
- B. Pie chart
- C. Bar chart
- D. Frequency polygon
Explanation
A scatter diagram displays paired values for two quantitative variables and helps show their relationship. Pie and bar charts are mainly used for categories, while a frequency polygon displays the distribution of one quantitative variable.
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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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