Stem-and-Leaf Plot
Enter whole numbers separated by spaces or commas.
A stem-and-leaf plot displays numerical data where the leading digit(s) form the 'stem' and trailing digits form the 'leaves'. It shows the distribution's shape while preserving individual data values — a quick alternative to a histogram.
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Tip: For large numbers, split each stem into two (0–4 leaves and 5–9 leaves). This gives more resolution and a clearer distribution shape without losing the individual data values.
- 1Sort data from smallest to largest
- 2Stem = all digits except the last (e.g., tens digit)
- 3Leaf = the last digit (units digit)
- 4Draw stems on the left; leaves on the right
Data: 12, 15, 18, 23, 25, 31, 35, 38=1 | 2 5 8
2 | 3 5
3 | 1 5 8Stem=tens, leaf=units
| Feature | Stem-Leaf | Histogram | Box Plot |
|---|---|---|---|
| Shows raw data | Yes | No | No |
| Shows distribution shape | Yes | Yes | Partially |
| Shows outliers | Yes | Yes | Yes |
| Best for | Small datasets (<50) | Any size | Comparing groups |
| Back-to-back version | Yes (compare 2 groups) | No | Side by side |
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Fun Fact
Stem-and-leaf plots were popularized by statistician John Tukey in his 1977 book 'Exploratory Data Analysis'. Tukey also invented the box-and-whisker plot and gave us the word 'bit' (binary digit) in computing.
References
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