Answer:
Mean Absolute deviation = 4.406
Explanation:
First start by calculating the mean
Mean =
= 20.125
Find the distance of each value from the mean
12 - 20.125 = -8.125
25 - 20.125 = 4.875
16 - 20.125 = -4.125
20 - 20.125 = -0.125
31 - 20.125 = 10.875
16 - 20.125 = -4.125
19 - 20.125 = -1.125
22 - 20.125 = 1.875
(Exclude the minus signs before adding to get the mean absolute deviation)
Find the mean of the distances
Mean absolute Deviation =

= 4.40626 to the nearest hundredth
≅4.406