Question

The following distribution gives the daily income of 50 workers of a factory:

Daily income in (Rs):	100−120	120−140	140−160	160−180	180−200
Number of workers:	12	14	8	6	10

Convert the above distribution to a less than type cumulative frequency distribution and draw its ogive.

Answer 1

Daily income (in Rs.)	No. of workers (f)	Daily income (less than)	Cumulative frequency	Suitable points
100−120	12	120	12	(120, 12)
120−140	14	140	26	(140, 26)
140−160	8	160	34	(160, 34)
160−180	6	180	40	(180, 40)
180−200	10	200	50	(200, 50)

Now, plot the less than ogive with suitable points.