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GCSE Statistics · key term
An explanation of the symbols, colours or numerical notation used in a diagram.
Used by Edexcel
Specification 2a.01, 2a.02 · Paper 1, Paper 2
Revise: Pictorial data representationA pictogram uses repeated pictures or symbols to represent frequencies. Its key states how many observations one full symbol represents. This lets a small number of symbols stand for a larger number of observations.
An explanation of what the colours, shades, patterns or symbols in a diagram represent.
Read a pictogram’s key before counting. A half or quarter symbol represents that fraction of the full symbol’s value.
Order both the stems and leaves in a stem-and-leaf diagram. Include repeated values and an unambiguous key with units.
Include clear labels and a key where needed. A Venn diagram also needs a rectangle representing the whole data set.
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