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Frequency Distribution Calculator — Frequency, Relative & Cumulative Tables
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Calculated result
30 observations · 6 classes
Minimum / maximum: 52 / 94
Range: 42
Cumulative final count: 30 (must equal n)
Grouped equal-width frequency table
| Class interval | Frequency | Relative | Cumulative | Cumulative % |
|---|---|---|---|---|
| 52 to < 59 | 2 | 6.6667% | 2 | 6.6667% |
| 59 to < 66 | 3 | 10% | 5 | 16.6667% |
| 66 to < 73 | 7 | 23.3333% | 12 | 40% |
| 73 to < 80 | 8 | 26.6667% | 20 | 66.6667% |
| 80 to < 87 | 6 | 20% | 26 | 86.6667% |
| 87 to 94 | 4 | 13.3333% | 30 | 100% |
Show the working
- 1. Parse and sort 30 numeric observations.
- 2. Split the observed range 52 to 94 into 6 equal-width class intervals.
- 3. Relative frequency = row count ÷ 30; cumulative frequency is the running count.
- 4. Check: final cumulative frequency = 30.
Grouped distributions depend on the chosen class boundaries and number of classes. Different valid grouping choices can make the same raw data look different.
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