PSI: Median, Interquartile Range and Box Plot
PSI: Median, Interquartile Range and Box Plot
Secondary 4
A set of pollutant standards index (PSI) has been taken on different parts of Singapore as follows.
| 28 | 29 | 30 | 24 | 25 |
|---|---|---|---|---|
| 29 | 25 | 28 | 22 | 28 |
- Find the
- median,
- interquartile range.
- Represent the data by a box-and-whisker plot.
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Answer:(a)(i) \(28\). (a)(ii) \(4\). (b) Five-number summary \((22,25,28,29,30)\).
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