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.
For example: 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 = 8The Mean is 8
Hope this helps :)