The coefficient of variation is calculated as, For group I, CV1=
σ
X
×100% =
6
113
×100% =5.309% For group II, CV2=
8
120
×100% =6.66% For group III, CV3=
7
115
×100% =6.086% If, CV of the data is less, then data is more consistent. since, $C V_{1} Therefore, the increasing order of consistencies is II<III<I .