Statistics II
Practical Geography · Statistics
Syllabus tag: KCSE | Geography | Form 3 | Topic 18 Statistics II
Lesson objectives
By the end of this topic, you should be able to:
- Construct and interpret compound, cumulative and divided bar graphs.
- Construct and interpret pie charts and divided circles.
- Construct proportional circles and squares.
- State the advantages and disadvantages of each method of presentation.
Summary
Statistics II extends the simple graphs of Form 1 to methods that show components within a total. A compound bar graph divides each bar into its parts; a pie chart converts each value to an angle using (value ÷ total) × 360°; and a proportional circle makes the area proportional to the value, so its radius is found from the square root.