In a town, 25% of the persons earned more than Rs 45000, whereas 75% earned more than Rs 18000. Calculate the absolute and relative values of dispersion.

Given, ${ Q }*{ 1 }$ = Rs 18000 ,
${ Q }*{ 3 }$ = Rs 45000

Absolute Value of Dispersion (QD) = ${ Q }

*{ 3 }$ -*

${ Q }{ 1 }$ / 2 = 45000 - 18000 /2 = Rs 13500

${ Q }

Relative Value of Dispersion (Coefficient of QD) = ${ Q }

*{ 3 }$ -*

${ Q }{ 1 }$ /

${ Q }

${ Q }

*{ 3 }$ +*

${ Q }{ 1 }$

${ Q }

= 45000-18000 / 45000+ 18000 = 27000/ 63000 = 0.429