A graph of cumulative frequencies plotted against upper class boundaries is called a:
Correct answer: B. Ogive
- A. Histogram
- B. Ogive
- C. Scatter diagram
- D. Frequency polygon
Explanation
An ogive is a cumulative frequency curve and is commonly plotted using upper class boundaries for a less-than distribution. A frequency polygon joins frequency points rather than cumulative frequency points.
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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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