When talking about the mean of something, we are asking the mean average. To get the mean average of something, sum up all the numbers in the set and divide the sum by the number of elements in the set.
0 + 1 + 1 + 2 + 2 + 5 + 3 + 3 + 4 + 6 + 5 + 7 + 6 + 9 = 45
45 / 14 ≈ 3.2
So, the mean average is 3.2.