Find the Mean from Tables of Data

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!