Lesson 2c.02

2c.02 Identify outliers by inspection and using appropriate calculations Quiz: Pearson Edexcel Statistics, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 2c.02, Identify outliers by inspection and using appropriate calculations: 20 multiple choice questions for the Pearson Edexcel GCSE Statistics (1ST0), Unit 2: Processing, representing and analysing data, 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 lower boundary for a small outlier using the IQR rule?

    • LQ + 1.5 x IQR
    • LQ - 1.5 x IQR
    • Median - IQR
    • UQ + 1.5 x IQR

  2. What is the boundary for a large outlier using the IQR rule?

    • LQ - 3 x IQR
    • UQ - 1.5 x IQR
    • Mean + 3 x SD
    • UQ + 1.5 x IQR

  3. LQ is 10 and UQ is 20. What is the upper outlier boundary?

    • 45
    • 35
    • 25
    • 30

  4. LQ is 10 and UQ is 20. What is the lower outlier boundary?

    • 0
    • 15
    • 5
    • -5

  5. LQ is 40 and UQ is 60. Using standard outlier limits, is a value of 105 an outlier?

    • No, within limits
    • Yes, above 100
    • Yes, above 90
    • No, below 105

  6. Which definition best describes an outlier identified by simple inspection?

    • The median value
    • Distant data value
    • The middle quartile
    • The modal category

  7. Is a data value of 66 an outlier if the mean is 50 and standard deviation is 5?

    • No
    • Exactly on limit
    • Cannot tell
    • Yes

  8. LQ is 8 and UQ is 14. Is a value of 4 an outlier using standard limits?

    • No, limit is 0
    • No, limit is -1
    • Yes, below 4
    • Yes, below 2

  9. Is 60 an outlier if the lower quartile is 12 and upper quartile is 30?

    • Undefined
    • Borderline
    • Yes
    • No

  10. Which numerical measure is used with quartiles to define outlier boundaries?

    • Mean
    • Range
    • Standard deviation
    • Interquartile range

  11. Is 180 an outlier if the lower quartile is 60 and upper quartile is 90?

    • Not enough data
    • Yes
    • Exactly on boundary
    • No

  12. LQ is 50 and IQR is 20. Which value is a small outlier?

    • 40
    • 15
    • 22
    • 30

  13. Why should you check for outliers before calculating the mean?

    • Changes the median
    • Improves the mode
    • Reduces data size
    • Distorts the mean

  14. Is a data value of 3 an outlier if lower quartile is 12 and upper quartile is 16?

    • No
    • Yes
    • Maximum value
    • Inconclusive

  15. Is 91 an outlier using the 3 standard deviation rule if the mean is 80 and SD is 4?

    • No
    • Yes
    • Cannot calculate
    • Exactly 3 SD

  16. Is 60 an outlier if the lower quartile is 20, median is 26, and upper quartile is 34?

    • Invalid test
    • Only just
    • Yes
    • No

  17. Test scores have UQ 70 and LQ 60. Which value is a large outlier?

    • 84
    • 88
    • 80
    • 75

  18. What does an interquartile range of zero imply about potential outliers?

    • No outliers possible
    • Any different value
    • Mean equals zero
    • All values match

  19. LQ is 25 and UQ is 45. Which values are outliers: 90 and 100?

    • Only 100
    • Neither
    • Both 90 and 100
    • Only 90

  20. Is a data value of 15 an outlier if the lower quartile is 45 and upper quartile is 60?

    • Too close
    • Cannot tell
    • Yes
    • No

All Pearson Edexcel Statistics quizzes