Question

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

Daily income(in ₹):	200 – 220	220 – 240	240 – 260	260 – 280	280 – 300
Number of workers:	12	14	8	6	10

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

Answer 1

The cumulative frequency table of 'Less than type' is given below.

Daily income(in ₹)	Cumulative Frequency
Less than 220	12
Less than 240	26
Less than 260	34
Less than 280	40
Less than 300	50

Mark the upper class class limits along the x-axis and the cumulative frequencies along y-axis.

Plot the points (220, 12), (240, 26), (260, 34), (280, 40) and (300, 50). Join the points to obtain the 'Less than type' ogive.