In a handloom factory different workers take different periods of time to weave a saree. The number of workers and their required periods are given below. Present the information by a frequency polygon.

No. of days
8 - 10 10 - 12 12 - 14 14 - 16 16 - 18 18 - 20

No. of workers 5 16 30 40 35 14

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Solution

Consider the following table

Class
(Number of days) Class Mark Frequency
(Number of workers)

8 - 10 9 5

10 - 12 11 16

12 - 14 13 30

14 - 16 15 40

16 - 18 17 35

18 - 20 19 14

The frequency polygon using the class mark and frequancy given in the above table as

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Similar questions

Daily wages (in ₹)	2−4	4−6	6−8	8−10	10−12	12−14	14−16	16−18
No. of Workers	11	14	20	32	25	7	5	2

Daily No. of hours	8 - 10	10 - 12	12 - 14	14 - 16
Number of workers	150	500	300	50

Income (₹)	5	10	15	20	25	30	35	40
Number of Workers	26	29	40	35	26	18	14	12

Using a graph paper, draw an ogive for the following distribution, which shows daily wages of 160 workers.

Using the graph determine:

Time required for experiment (minutes)	20 - 22	22 - 24	24 - 26	26 - 28	28 - 30	30 - 32
No. of students	8	16	22	18	14	12

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No. of days	8 - 10	10 - 12	12 - 14	14 - 16	16 - 18	18 - 20
No. of workers	5	16	30	40	35	14