Calculate coefficient of variation from the following data-set:

Explanation

`barX=A+(sumfdx')/(sumf)xxC`
`=35+(-40)/(100)xx10`
=35-4=31
`sigma=sqrt((sumfdx'^(2))/(N)-((sumfdx')/(N))^(2))xxC`
`=sqrt((270)/(100)-((-40)/(100))^(2))xx10`
`=sqrt(2.7-(0.4)^(2))xx10`
`=sqrt(2.7xx0.16)xx10`
`=sqrt(2.54)xx10`
`=1.594xx10`
=15.94
`CV=(sigma)/(barX)xx100`
`=(15.94)/(31)xx100`
=51.42
Coefficient of Variation =51.42.