数学

Stem Leaf Plot

Stem-and-Leaf Plot

Enter whole numbers separated by spaces or commas.

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とは何か Stem Leaf Plot?

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A stem-and-leaf plot display tool organises numerical data by splitting each value into a stem (leading digits) and leaf (final digit), making data distribution instantly visible.

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公式

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f(x)Stem-and-leaf: orders data by place value; shows distribution shape and actual data points

変数の説明

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記号	名前	単位	説明
Stem	Higher place value (tens, hundreds)	—	—
Leaf	Lower place value (ones)	digits 0-9	—

方法 Stem Leaf Plot

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1Split: 23 → stem 2, leaf 3
2Arrange stems in a vertical column
3Add leaves beside their stem, in ascending order
4Count leaves to find frequencies; find median easily

解いた例

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例 1

入力:Exam scores: 52,55,61,62,68,71,74,78,82,85,91

結果:5|2 5 6|1 2 8 7|1 4 8 8|2 5 9|1

実際の応用

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Data analysis and visualization

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Comparative group analysis

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Statistical education

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Survey data exploration

Reading a Stem-and-Leaf Plot

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Row	Values represented
5\|2 5	52, 55
6\|1 2 8	61, 62, 68
7\|1 4 8	71, 74, 78
8\|2 5	82, 85
9\|1	91

よくある質問

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What's the difference between stem-and-leaf and stem-leaf-plot?

Same thing, different names. Stem-and-leaf is the standard term.

How do I find the median in a stem-and-leaf plot?

Count total leaves. Find middle value. If n is even, average two middle values.

Can stem-and-leaf plots be back-to-back?

Yes! Compare two groups (e.g., male/female heights). Mirrors stem in centre, leaves on either side.

参考文献

›Stem-and-leaf — Statistics How To

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Reviewed October 2026

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