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

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