There are several different types of averages.
An average is one number that represents a set of numbers.
The mean is a number that we calculate by adding up all the numbers in the set and dividing this total by how many numbers there are.
Here are three pupils' scores in a weekly spelling test across 6 weeks:
Example
Find the mean score from week 1.
Answer
Step 1: Find the total score from week 1:
9 + 7 + 2 = 18
Step 2: Now divide the total by how many numbers there are in the set, which is 3:
18 ÷ 3 = 6
The mean score from week 1 is 6
Easy, right?
Let's have a go at some questions then!