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Learn how to create and interpret pie graphs to display data proportions and angles. Explore histograms to show grouped continuous data visually, with the area reflecting frequency. Bar graphs for discrete data, depicting frequency by bar height. Detailed exercises on page 254, Exercise E and F. 8
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Note 11: Pie and Bar Graphs Pie Graphs Sectors show the proportions of the data To find the angles for the pie graph, multiply the proportion/percentage by 360° 60% - 0.6 × 360° = 216°
Histogram – display grouped continuous data – area represents the frequency frequency Bar Graphs – display discrete data Distance (cm) – counted data – draw bars (lines) with the same width – height represents frequency
Page 254 Exercise E and F