The daily wages in a factory are distributed as follows:
Daily wages (in Rs.) $125 - 175$ $175 - 225$ $225 - 275$ $275 - 325$ $325 - 375$
Number of workers $4$ $20$ $22$ $10$ $6$
Draw a frequency polygon for this distribution.

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Solution

Steps:
(i) Draw a histogram for the given data.
(ii) Mark he mid-points at the top of each rectangle of the histogram drawn.
(iii) Also, mark the mid-point of the immediately lower class-interval and mid-point of the immediately higher class-interval.
(iv) Join the consecutive midpoints marked by straight lines to obtain the required frequency polygon.
The required frequency polygon is as follows:

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Similar questions

Wages (Rs)	$125 - 175$	$175 - 225$	$225 - 275$	$275 - 325$	$325 - 375$	$375 - 425$	$425 - 475$	$475 - 525$
Number of workers	$2$	$22$	$19$	$14$	$3$	$4$	$6$	$1$

:

Daily wages (in Rs.)	$12.5 - 17.5$	$17.5 - 22.5$	$22.5 - 27.5$	$27.5 - 32.5$	$32.5 - 37.5$
Number of workers	$4$	$20$	$22$	$10$	$6$

Daily wages (in Rs)	100	125	150	175	200
Number of workers	6	8	9	12	10

Daily wages (in Rs)	500-520	520-540	540-560	560-580	580-600
Number of workers	12	14	8	6	10

Daily wages (in Rs.)	100-120	120-140	140-160	160-180	180-200
Number of workers	12	14	8	6	10

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