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Paper 1Statistical Techniques3 marks
An ungrouped frequency distribution of ages is provided.
Data Table
Ages of Participants
The table shows the ages of participants in a survey.
| Age | Frequency |
|---|---|
| 20 | 3 |
| 21 | 5 |
| 22 | 7 |
| 23 | 4 |
| 24 | 1 |
- a[3]
Calculate the interquartile range (IQR) of the ages.
Aim for approximately 3 distinct marking points.
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