Question

Draw ogive$—$(a) less than, and (b) more than of the folowing data:

Weekly wages of No of workers	:	100-105	105-110	110-115	115-120	120-125	125-130	130-135
Workers (₹)	:	200	210	230	320	350	520	410

Answer 1

In order to construct the ogives, we first need to calculate the less than and the more than cumulative frequencies as as follows.

Weekly Wages	Cumulative Frequency
Less than 105 Less than 110 Less than 115 Less than 120 Less than 125 Less than 130 Less than 135	200 200 + 210 = 410 410 + 230 = 640 640 + 320 = 960 960 + 350 = 1410 1410 + 520 = 1930 1930 + 410 = 2240

Weekly Wages	Cumulative Frequency
More than 100 More than 105 More than 110 More than 115 More than 120 More than 125 More than 130	2240 2240$-$200 = 2040 2040$-$210 = 1830 1830$-$230 = 1600 1600$-$320 = 1280 1280$-$350 = 930 930$-$520 = 410