Example: 1, 1, 2, 2, 3, 3, 3, 4, 5, 5, 5. the mean of that is 3.1, we would round that to 3. 3-1=2.3-1=2.3-2=1.3-2=1.3-3=0.3-3=0.3-3=0.4-3=1.5-3=2.5-3=2.5-3=2. your set of data becomes 2,2,1,1,0,0,0,1,2,2,2,added up they equal 13 divided by 11 it equals around 1.2 rounded down i equals 1