The

To calculate it:

• add up all the numbers,

• then divide by how many numbers there are.

Example: what is the mean of 2, 7 and 9?

Add the numbers: 2 + 7 + 9 = 18

Divide by how many numbers (i.e. we added 3 numbers): 18 ÷ 3 = 6

So the mean is 6

Note: there are other types such as

**Arithmetic Mean**is the average of the numbers: a calculated "central" value of a set of numbers.To calculate it:

• add up all the numbers,

• then divide by how many numbers there are.

Example: what is the mean of 2, 7 and 9?

Add the numbers: 2 + 7 + 9 = 18

Divide by how many numbers (i.e. we added 3 numbers): 18 ÷ 3 = 6

So the mean is 6

Note: there are other types such as

**Geometric Mean**and**Harmonic Mean**.See: Geometric Mean

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