2.2 Summarising Data: Measure of Spread or Dispersion

Collected data can be summarised by using the following measures of central tendency and spread.

• Summarise single sets (personal lives) of collected data.
• Summarise and compare two sets (wider community) and multiple sets (national and global issues) of collected data using the following measures of central tendency and spread.

Measure of Spread or Dispersion 



Example 1

Example 2

Range, Variance and Standard Deviation: Measure of Spread

Khan Academy. (2010). Measures of dispersion (Standard YouTube licence)

Activity