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GCSE Geography · key term
A value marking a particular percentage position in ordered data. Approximately 90% of values lie at or below the 90th percentile.
Used by AQA and OCR
Paper 1, Paper 2, Paper 3
Revise: Descriptive Statistics: Central Tendency, Spread and PercentagesPercentiles divide ordered data into 100 parts. The 25th percentile is the lower quartile, the 50th is the median and the 75th is the upper quartile.
Specification 9.3 · Paper 1, Paper 2, Paper 3
A value marking a percentage position in data ordered from smallest to largest. Approximately 70% of observations lie at or below the 70th percentile; ties and calculation conventions can affect the exact proportion.
Revise: Basic Number Skills, Scale, and PercentagesA percentile describes a value's position within data ordered from smallest to largest. The 70th percentile is a threshold with approximately 70% of observations at or below it and approximately 30% above it. Exact proportions can differ in small datasets or where values are repeated.
Distinguish a percentile's position in ordered data from the measurement at that position. Use any calculation convention specified in the question.
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