Coefficient of variance

• Coefficient of variance expresses standard
  deviation relative to its mean

X

s

cv 

Weights of newborn

elephants (kg)

929 853

878 939

895 972

937 841

801 826

Weights of newborn

mice (kg)

0.72 0.

0.63 0.

0.59 0.

0.79 0.

1.06 0.

n=10, = 887.

s = 56.50, cv = 0.

X n=10, = 0.

s = 0.255, cv = 0.

X

Mice show

greater birth-

weight variation