Stem-and-leaf
AQA GCSE Maths revision on Stem-and-leaf. Aligned to the AQA GCSE Mathematics 8300 specification. This bank has 16 practice questions on this topic.
Sample questions (3 of 16)
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Question 1
A student forgets to include a key in their stem-and-leaf diagram. Why is the diagram now considered incomplete?
- A) The mean cannot be calculated without it
- B) The scale and units of the data are ambiguous
- C) The range cannot be identified
- D) The diagram is not technically a graph
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Answer: The scale and units of the data are ambiguous
Without a key, a reader cannot tell if '1 | 2' represents 12, 1.2, or 120. The key provides the necessary context to interpret the numerical values represented by the layout.
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Question 2
Which statistical measure is most easily identified by looking at the shape of a stem-and-leaf diagram without performing any calculations?
- A) Mean
- B) Mode
- C) Range
- D) Standard deviation
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Answer: Mode
Because the leaves are ordered, the mode appears as the most repeated digit within a specific row. Other measures like the mean require summing the data, while the range requires identifying the absolute extremes.
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Question 3
If a stem-and-leaf diagram has a stem with no corresponding leaves, what does this indicate about the data set?
- A) The data is skewed
- B) There is a gap in the range of values
- C) The data is continuous
- D) The stem is invalid
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Answer: There is a gap in the range of values
Stem-and-leaf diagrams must maintain a consistent interval between stems. An empty stem indicates that while that numeric range exists within the context of the data, no actual observations fell into that interval.
Want to test yourself on the remaining cards for this topic?
13 more questions on Stem-and-leaf — plus mistakes tracking and spaced repetition across the whole Maths spec.