Which presentation method is most appropriate for comparing the numbers of employees in several departments?
Correct answer: A. Bar chart
- A. Bar chart
- B. Pie chart
- C. Ogive
- D. Stem-and-leaf plot
Explanation
A bar chart makes separate category totals easy to compare using the heights of bars. A pie chart emphasises parts of a whole, while an ogive shows cumulative frequencies.
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About Data Collection and Presentation
Data collection covers primary and secondary sources, qualitative and quantitative data, discrete and continuous variables, sampling methods and questionnaire design. Presentation includes frequency tables, grouped data, bar charts, histograms, pie charts, line graphs and cumulative frequency curves, with care over class intervals and misleading scales.
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