Lesson T6.2.2

T6.2.2 Range, outliers and comparing distributions Quiz: KS3 Maths, Unit 6

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson T6.2.2, Range, outliers and comparing distributions: 20 multiple choice questions for the KS3 Maths (National Curriculum), Unit 6: Statistics, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. What is the range of 3, 8, 12 and 15?

    • 9
    • 3
    • 12
    • 15

  2. What is an extreme value that lies away from the rest of the data?

    • Mean
    • Outlier
    • Mode
    • Median

  3. Which value is an outlier in 12, 13, 14, 13 and 40?

    • 13
    • 40
    • 14
    • 12

  4. What is the range of 12, 13, 14 and 13 after removing the outlier 40?

    • 28
    • 1
    • 40
    • 2

  5. Set A has a range of 5 and set B has a range of 12. Which is more spread out?

    • Set A
    • They are equal
    • Set B
    • Cannot tell

  6. Two classes have equal means, but class one has a range of 5 and class two 25. Which is more consistent?

    • Class one
    • Cannot tell
    • Class two
    • Both equal

  7. What can affect the range of a data set?

    • A single outlier
    • Only the mean
    • Nothing
    • Only the mode

  8. Which average is least affected by extreme values or outliers?

    • Mean
    • Total
    • Median
    • Range

  9. Heights are 150, 152, 151, 149 and 210 cm. Which value is an outlier?

    • 152 cm
    • 150 cm
    • 149 cm
    • 210 cm

  10. Reaction times are 0.3, 0.4, 0.35 and 0.9 seconds. What is the range?

    • 0.5
    • 0.9
    • 0.6
    • 0.3

  11. Set A is 45, 50, 55 and set B is 20, 50, 80. Both have a mean of 50. Which set is more consistent?

    • Set B
    • Cannot compare
    • Set A
    • They are equal

  12. Set 5, 6, 7, 8 and 30 has an outlier. What is the range without the outlier?

    • 25
    • 5
    • 3
    • 30

  13. Why should identified outliers in a data set be investigated?

    • They might be errors
    • They prove normal distribution
    • They must be deleted
    • They change the median

  14. Shop X has a daily sales range of 10 and shop Y has a range of 40. Which shop had more stable daily sales?

    • Shop Y
    • Both are equal
    • Shop X
    • Neither shop

  15. Which pair of measures should be used to compare two distributions?

    • Average and spread
    • Range and mode
    • Total and count
    • Mean and median

  16. What does a data set range of zero indicate?

    • All values zero
    • One single outlier
    • No data recorded
    • All values equal

  17. Ages are 11, 12, 12, 13, 14 and 60. Which value is most likely an outlier?

    • 12
    • 60
    • 14
    • 11

  18. Group 1 has a range of 20 and a median of 60. Group 2 has a range of 6 and a median of 58. Which group had more varied marks?

    • Group 2
    • Equal variation
    • Cannot say
    • Group 1

  19. What is the range of 2.5, 7.1, -3.4 and 4.0?

    • 3.7
    • 10.5
    • 4.6
    • 6.5

  20. Monthly rainfall is 40, 45, 50, 42 and 48 mm. What is the range?

    • 8 mm
    • 45 mm
    • 50 mm
    • 10 mm

All KS3 Maths quizzes