interquartile range
What interquartile range means in Mathematics A-Level, as defined for AQA, WJEC.
Definitions of interquartile range
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Reference: WJEC
A measure of variation calculated as Q₃ − Q₁.
The difference Q3 − Q1, describing the spread of the middle 50% of ordered data.
Topics that use interquartile range
- L: Data presentation and interpretation (AQA A-Level)
- Data presentation and interpretation (AS Unit 2: Applied Mathematics A) (WJEC A-Level)
Related terms
- data cleaning
- Frequency density
- standard deviation
- Summary statistics
- Bivariate data
- bivariate interpretation
- box plot conventions
- causal inference
Using interquartile range in the exam
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