The answer to this question is 3.
First, we have to find the mean of this problem.
Next, we have to find the distance each of these points are from the mean.
2
= 3 - 1 = 2
4
4 - 3 = 1
5
4 - 3 = 1
2
3 - 2 = 1
The (MAD) or mean absolute deviation is 1.
Why?: