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9. Data collection, representation and analysis
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9A Types of Data
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9B Dot plots and column graphs
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9C Line Graphs
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9D Sector Graphs and divided bar graphs
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9E Frequency Distribution tables
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9F Frequency Histograms and frequency polygons
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9G Mean, median, mode and range
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9H Interquartile Range - extension
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9I Stem and leaf plots
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9J Surveying and sampling
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