Question

find the surom their meanm of the deviations of the variote values 3,4,6,8,14 from their mean

Answer 1

mean = (3 + 4 + 6 +8 + 14) / 5 

mean = 7 

sum of deviation = (3-7) + (4-7) + (6-7) + (8-7) + (14-7) 
= -4 + -3 + -1 + 1 + 7 
= 0

Answer 2

mean =
$\frac{sum \: of \: variote \: value}{total \: number \: of \: variote \: value}$
=
$\frac{3 + 4 + 6 + 8 + 14}{5}$
$\frac{35}{5}$
=7 is the mean