REVISION NOTES
IGCSE Edexcel Mathematics A
6.1 Graphical Representation of Data
6.1.1 Use different methods of presenting data
Types of Data
1) Discrete data takes an exact value.
For example: Age
Presentation of Data: Stem-and-leaf, Frequency Table
Statistical Diagram: Histogram, Cumultaive Frequency
2) Continuous data takes a range of values.
For example: Height
Presentation of Data: Frequency Table
6.1.2 Use appropriate methods of tabulation to enable the construction of statistical diagrams
6.1.3 Interpret statistical diagrams
6.1.4 Construct and interpret histograms (Higher Tier Only)
A histogram uses rectangle to represent each group (or class) interval.
- The rectangles should touch, with no gaps between them.
- Frequency = Frequency density (height) x Group width
6.1.5 Construct cumulative frequency diagrams from tabulated data (Higher Tier Only)
6.1.6 Use cumulative frequency diagrams (Higher Tier Only)
