To find the mean, you add up all of the numbers, then divide the sum by the amount of numbers you have.
You have 9 numbers:
22, 7, 22, 1, 7, 18, 16, 6, 6
Now you need to add them together
22 + 7 + 22 + 1 + 7 + 18 + 16 + 6 + 6 = 105
Now you divide:
or 11.6666666666.......