Which chart is most suitable for showing the monthly movement of a variable over several years?
Correct answer: A. Line graph
- A. Line graph
- B. Pie chart
- C. Bar chart
- D. Pictogram
Explanation
A line graph connects values in time order and clearly shows trends, rises, and falls. A pie chart shows composition, while a bar chart is mainly used to compare separate categories.
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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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