Chapter 12: Statistics
12.1 Graphical Representation
Data can be presented in the form of:
- 1. Bar Graphs
- 2. Histograms (for continuous class intervals)
- 3. Frequency Polygons
12.2 Histograms
Uniform Width
Height of rectangle โ Frequency
Varying Width
Height = (Freq / Width) ร Min Width
Summary
1. Statistics deals with collection, presentation, analysis and interpretation of data.
2. Data can be primary or secondary.
3. Frequency Polygon can be drawn independently without drawing a histogram.