Calculate the coefficient of range for the following data.
No. of wards $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$
No. of houses $32$ $57$ $28$ $96$ $138$ $90$ $66$ $58$

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Solution

Here $H = 8, L = 1$ . Hence,
Coefficient of range $= \frac{H - L}{H + L} = \frac{8 - 1}{8 + 1} = \frac{7}{9} = 0.78$ (approximately).

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Income (₹)	:	50	70	80	90	100	120	130	150
No of workers	:	2	8	12	7	4	3	8	6

No. of rooms	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
No. of houses	$4$	$9$	$22$	$28$	$24$	$12$	$8$	$6$	$5$	$2$

Calculate coefficient of variation of the following series:

$\begin{matrix} S. No & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 Frequency & 53 & 58 & 25 & 30 & 54 & 42 & 32 & 48 & 46 & 52 \end{matrix}$

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No. of wards	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$
No. of houses	$32$	$57$	$28$	$96$	$138$	$90$	$66$	$58$