MEAN MACHINE

The Mean Machine

See how the Arithmetic Mean (or Average) is calculated:

To find the Mean (or Average) divide the
Sum of the numbers by the Count of the numbers

 Numbers: 

7

7

21

7

= 3

 Count

 Sum

 Count

Divide

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How to Find the Mean

The mean is the average of the numbers.

It is easy to calculate: add up all the numbers, then divide by how many numbers there are.

In other words it is the sum divided by the count.

Example 1: What is the Mean of these numbers?

6, 11, 7

• Add the numbers: 6 + 11 + 7 = 24
• Divide by how many numbers (there are 3 numbers): 24 / 3 = 8

The Mean is 8