In a town 25% of the persons earned more than Rs. 45000 where as 75% earned more than Rs. 18000. The relative dispersion will be?

Dear student, 
As per the question it is given that
Third quartile (Q3) = 45000
First quartile ‚Äč(Q1) = 18000

Relative value of dispersion is coefficient of quartile deviation
Coefficient of quartile deviation = Q3-Q1 Q3+Q1Coefficient of quartile deviation = 45000 - 18000 45000 + 18000 = 0.428

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