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 distribution above to a less than type cumulative frequency distribution, and draw its ogive.
The frequency distribution table of less than type is as follows.
Daily income (in Rs) (upper class limits) |
Cumulative frequency |
Less than 120 |
12 |
Less than 140 |
12 + 14 = 26 |
Less than 160 |
26 + 8 = 34 |
Less than 180 |
34 + 6 = 40 |
Less than 200 |
40 + 10 = 50 |
Taking upper class limits of class intervals on x-axis and their respective frequencies on y-axis, its ogive can be drawn as follows.