Question

Find the sum of deviations of all observations of the data 5,8,10,15,22from their mean.

Answer 1

mean = (sum of the observations)/number of observations

mean = (5+8+10+15+22)/5

= 60/5
mean=12

sum of the deviations = (5-12)+(8-12)+(10-12)+(15-12)+(22-12)

=-7-4-2+3+10
=-13+13
=0

Answer 2

Sum of observation = 5+8+10+15+22

=60

No.of observations = 5

Mean = 60 / 5 = 12

Sum of deviations of observations

= (5-12) +(8-12)+(10-12)+(15-12)+(22-12)

=-7-4-2+3+10

=-13+13

=0