Measures of Dispersion

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Find the Q.D. for the following data.
3, 16, 8, 15, 19, 11, 5, 17, 9, 5, 3.

The city traffic police issued challans for not observing the traffic rules:

Day of the Week	Mon	Tue	Wed	Thus	Fri	Sat
No. of Challans	40	24	36	58	62	80

Find Q.D.

Calculate Q.D. from the following data:

X (less than)	10	20	30	40	50	60	70
Frequency	5	8	15	20	30	33	35

Calculate the appropriate measure of dispersion for the following data:

Wages (In ₹)	Less than 35	35 – 40	40 – 45	45 – 50	50 – 55	55 – 60
No. of workers	15	50	85	40	27	33

Calculate Q.D. of the following data:

Height of plants (in feet)	2 – 4	4 – 6	6 – 8	8 – 10	10 – 12	14 – 14	14 – 16
No. of plants	15	20	25	12	18	13	17

Calculate Q. D. for the following data:

X	24	25	26	27	28	29	30
F	6	5	3	2	4	7	3

Following data gives the weight of boxes.
Calculate Q.D. for the data:

Given below are the prices of shares of a company for the last 10 days. Find Q.D.: 172, 164, 188, 214, 190, 237, 200, 195, 208, 230.

Measures of Dispersion - Quartile Deviation (Semi - Inter Quartile Range)