Paper 2 · Statistics
⏱ Tested in 1 exam question since 2025
Lesson 9 of 23
LCOL Statistics 10: Interquartile Range
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- Find the lower and upper quartiles
- Work out the interquartile range — the spread of the middle 50%
Formula used
Interquartile range
IQR = upper quartile − lower quartile
On page 20 of the log tables — read it off, don’t memorise.Most recent exam questions
- 2025 P2 Q1(b)
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