Answer:
MAD = 1.5.
Explanation:
MAD is the Mean Absolute Deviation.
The MAD is a measure of the spread of the data.
The mean of these numbers is (1 + 4 + 5 + 6) / 4
= 16/4 = 4.
Now you subtract this from the individual values and take the absolute values:
1 - 4 = -3 (absolute value = 3).
4-4 = 0
5-4 = 1
6-4 = 2.
Adding 0+1+2+3 = 6.
The MAD = 6 / 4 = 1.5.