Quartiles and interquartile range

Sample Quartiles and interquartile range questions

A few of the 46 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 11 markGrade 2-3
   Here are the heights, in centimetres, of some children: $98, \ 103, \ 91, \ 85, \ 159, \ 102, \ 91$ Which height is an outlier?
   Show the worked solution

   Most heights are clustered between 85 and 103 cm. The value 159 cm is far away from the rest.

   Outlier $= 159$

What are the common mistakes in Quartiles and interquartile range?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

• Calculates the range when the interquartile range was asked for, or vice versa

  Gave the range (max - min) instead of the interquartile range

• Q1 q3 mixed up

  Gave the upper quartile as the answer for the lower quartile, or vice versa

• Picks a value from within the main cluster of a dataset instead of the value clearly separated from the rest

  Picked the largest value within the main cluster instead of the value clearly separated from the rest

Quick answers about Quartiles and interquartile range

How many Quartiles and interquartile range practice questions are there?

There are 46 self-marking GCSE and IGCSE Maths questions on Quartiles and interquartile range, written for AQA, Pearson, OCR, Pearson International GCSE Maths A (4MA1), Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Foundation and Higher and Extended tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise Quartiles and interquartile range?

No. You can start practising Quartiles and interquartile range straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.