Graphs, charts and tables are used to help organise and order data. We can use statistical processes to analyse raw or grouped data in order to measure spread or calculate averages.
The range is one of the ways to measure how spread out the numbers are.
The range is the difference between the highest and lowest numbers.
Here are Kieran's results again:
10, 14, 10, 12, 11, 10, 11, 12, 10, 11, 9 and 12.
Kieran's highest number is 14, and the lowest 9.
Therefore, the range is 14 - 9 = 5.
To find the range of a set of numbers, you need to:
What is the range of this set of numbers?
5, 8, 3, 6, 2, 8, 6, 9, 3
Lowest number = 2
Highest number = 9
Range = 9 – 2 =7