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

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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.

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The 20 questions

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

    • 9
    • 3
    • 12
    • 15

  2. What is an outlier?

    • The most common value, which appears most
    • A value far from the rest of the data
    • The average of all the values in the data
    • The middle value when the data is ordered

  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 a mean of 60. Class one has a range of 5 and class two has a range of 25. Which class is more consistent?

    • The class with range 5
    • Cannot tell
    • The class with range 25
    • Both are the same

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

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

  8. Which statement about the median is true?

    • It ignores all the data values, using only the ends
    • It is always larger than the mean of the data
    • It is not strongly affected by extreme values
    • It is always equal to the mode of the data

  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 you check outliers in data?

    • They may be errors in the data
    • They make the mode larger
    • They always show the best result
    • They change the number of data points

  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 statements about comparing distributions are valid?

    • Compare averages and spreads together
    • Compare totals only, as they show the whole
    • Compare the colours of the two charts used
    • Compare averages only, never the spread

  16. A data set has a range of 0. What does this mean?

    • There are no values in the set
    • The data is random and unpredictable
    • The mean is zero for this data set
    • All the values are the same

  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

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