Mathematics
Construct a frequency table from the following cumulative frequency table :
| Class interval | Cumulative frequency |
|---|---|
| 1-10 | 7 |
| 11-20 | 15 |
| 21-30 | 30 |
| 31-40 | 42 |
| 41-50 | 60 |
| 51-60 | 75 |
Statistics
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Answer
The frequency table:
| Class interval | Cumulative frequency | frequency |
|---|---|---|
| 1-10 | 7 | 7 |
| 11-20 | 15 | 15 - 7 = 8 |
| 21-30 | 30 | 30 - 15 = 15 |
| 31-40 | 42 | 42 - 30 = 12 |
| 41-50 | 60 | 60 - 42 = 18 |
| 51-60 | 75 | 75 - 60 = 15 |
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