The mean average is not always a whole number.
The mean is the total of the numbers divided by how many numbers there are.
To work out the mean:
Add up all the numbers.
7 + 9 + 11 + 6 + 13 + 6 + 6 + 3 + 11 = 72
Divide the answer by how many numbers there are.
There are 9 numbers.
72 ÷ 9 = 8
So the mean value is 8.
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