step 1
Find the mean of the data set
so
mean=(10+22+15+12+16)/5
mean=75/5=15
step 2
Find the absolute value of the difference of each value with the mean
15-10=5
22-15=7
15-15=0
15-12=3
16-15=1
step 3
Adds the values and find out the average
so
(5+7+0+3+1)/5
=16/5
=3.2
therefore
the answer is 3.2