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GCSE Statistics · key term
A numerical measure of the direction and strength of association between the ranks of two paired sets of data, written .
Used by Edexcel
Specification 2e.05, 2e.06, 2e.08 · Paper 1, Paper 2
A number, written , measuring the direction and strength of the association between two sets of ranks. Its value lies between −1 and +1 inclusive.
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A measure of the strength and direction of the relationship between two variables using their ranks rather than their original values. It measures how consistently one variable increases or decreases as the other increases.