Question

if n=20,summation of x=240, summation of x^2=3650,compute S.D. and C.V​

Answer 1

Answer:

=

n

∑x

2

−(

n

∑x

)

2

=

10

1530

−(12)

2

=

153−144

=

9

=3

Coefficient of variation =

x

σ

×100

=

12

3

×100

=

4

1

×100

=25