AQA GCSE Mathematics · 8300
Specification S4 · Paper 1, Paper 2, Paper 3
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GCSE Mathematics · key term
The difference between the upper and lower quartiles; it measures the spread of the middle half of the data.
Used by AQA and OCR
Specification S4 · Paper 1, Paper 2, Paper 3
Specification 12.03a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
The difference between the upper and lower quartiles: . It measures the spread of the middle 50% of the data.
If the interquartile range and one quartile are given, rearrange to find the missing quartile.
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When comparing distributions, make separate, contextual comparisons of centre and spread. For example, compare medians and then compare interquartile ranges.
Compare like with like: median with median and interquartile range with interquartile range, using the same units.