MEAN

What is Mean and how do we find it?

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.

Example 2:

Look at these numbers: 

3, 7, 5, 13, 20, 23, 39, 23, 40, 23, 14, 12, 56, 23, 29

The sum of these numbers is 330

There are fifteen numbers.

The mean is equal to 330 / 15 = 22

The mean of the above numbers is 22.

Example 3:

Look at these numbers: 

5, 4, 3, 12, 2

The sum of these numbers is 26

There are five numbers.

The mean is equal to 26 / 5 = 5.5

The mean of the above numbers is 5.5.

Exercise:

Look at these numbers: 

12, 12, 14, 15, 23, 24, 25

Calculate the mean of the above numbers