Question

Calculate coefficient of variation of marks
secured by a student in the exam, where the
marks are : 85, 96, 91, 88, 98, 82.​

Answer 1

Answer:

Here, n = 6,

x¯=∑xin=5406 = 90

Var(X) =

σx2=1n∑(xi-x¯)2=1946 = 32.33

∴ S.D. =

σx=Var(X)

= 32.33

= 5.69

Now, C.V. =

100×σxx¯

=

100×5.6990

answer = 6.32%