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Question
Following are the ages of360 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.
Solution
| Age (in years) | No. of students | 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 |
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