16-4(a). Evaluate an appropriate measure of dispersion for the following data : Income (in Rs.) Less than 50 50-70 70-90 90-110 110 130 130 150 Above 150 54 No. of persons (b) Comment on the following: If the coefficient of quartile deviation (Q.D) is 0.6 and Q.D. 100 140 300 230 125 51 15, then Q-10 and Q, 40. Coe ievwitartile a wiitrye.i 236 a We

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