Statistics (III)
Mathematics SSS 1 Third Term
WEEK 11
Statistics (III)
Performance Objectives
Students should be able to;
- Construct frequency polygon from a grouped data
- Interpret frequency polygon
- Compute data in a frequency polygon graph
Frequency polygon
Content
The frequency polygon is obtained by joining the midpoints of the tops of the histogram rectangles with straight lines. Since the polygon is a closed figure, we take one interval below the lowest internal on the base axis. Then we join the ends of the polygon to the midpoints of the new intervals.
A frequency polygon is another graphical representation of a distribution. It is obtained in two ways.
- By joining the midpoints.... View More
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