Following are the ages of 360 patients getting medical treatment in a hospital on a day:
Age (in years) | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 |
No. of patients : | 90 | 50 | 60 | 80 | 50 | 30 |
Construct a cumulative frequency distribution.
Age (in years) | No. of patients | Age (in years) | Cumulative frequency |
10-20 | 90 | Less than 20 | 90 |
20-30 | 50 | Less than 30 | 140 |
30-40 | 60 | Less than 40 | 200 |
40-50 | 80 | Less than 50 | 280 |
50-60 | 50 | Less than 60 | 330 |
60-70 | 30 | Less than 70 | 360 |
N = 360 |