Lesson 2e.05

2e.05 Apply formula to determine Spearman’s rank correlation coefficient Quiz: Pearson Edexcel Statistics, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 2e.05, Apply formula to determine Spearman’s rank correlation coefficient: 20 multiple choice questions for the Pearson Edexcel GCSE Statistics (1ST0), Unit 2: Processing, representing and analysing data, written with Revision Ninja.

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The 20 questions

  1. What is the numerator of the fraction inside Spearman's rank correlation coefficient formula?

    • 6(n squared - 1)
    • 3 sum(d squared)
    • 1 - sum(d squared)
    • 6 sum(d squared)

  2. A set has n = 8 and sum of d squared = 84. What is rs?

    • -1
    • 0
    • 0.5
    • 1

  3. A set has n = 4 and sum of d squared = 20. What is rs?

    • 0
    • 2
    • -1
    • 1

  4. A set has n = 6 and sum of d squared = 10. What is rs to two decimal places?

    • -0.71
    • 0.5
    • 0.29
    • 0.71

  5. A set has n = 5 and sum of d squared = 0. What is rs?

    • 1
    • 5
    • -1
    • 0

  6. In Spearman's rank formula, what does d represent?

    • Sample size
    • Rank difference
    • Squared mean
    • Raw value

  7. Why are rank differences squared in Spearman's formula?

    • Remove negatives
    • Double values
    • Find percentages
    • Increase accuracy

  8. A set has n = 7 and sum of d squared = 14. What is rs?

    • -0.75
    • 0.5
    • 0.25
    • 0.75

  9. Spearman's rank correlation coefficient is calculated using which type of data?

    • Raw data
    • Categorical data
    • Grouped data
    • Ranked data

  10. With n = 9, what is n(n squared - 1)?

    • 720
    • 81
    • 80
    • 648

  11. A set has sum of d squared = 30 and n(n squared - 1) = 120. What is rs?

    • 0.5
    • -0.5
    • -1.5
    • 1.5

  12. What is the first step required when calculating Spearman's rank correlation coefficient?

    • Rank variables
    • Square values
    • Plot scatter diagram
    • Find mean

  13. Are tied ranks assessed in GCSE Statistics Spearman's rank questions?

    • Always tested
    • Tested at Higher tier
    • Tested at Foundation tier
    • Not tested

  14. In Spearman's rank formula, what does d squared stand for?

    • Deviation from median
    • Squared rank difference
    • Double data value
    • Difference of means

  15. A set has n = 5 and sum of d squared = 4. What is rs?

    • 0.2
    • 0.8
    • -0.8
    • 0.4

  16. A set has n = 10 and sum of d squared = 66. What is rs?

    • 0.4
    • -0.6
    • 0.6
    • 1.66

  17. Which tool can be used to find Spearman's coefficient during an exam?

    • Spreadsheet software
    • Calculator functions
    • Statistical tables
    • Graphical software

  18. For a fixed n, what happens to rs as the sum of d squared increases?

    • rs becomes undefined
    • rs becomes larger
    • rs stays unchanged
    • rs becomes smaller

  19. A set has n = 12 and sum of d squared = 198. What is rs to two decimal places?

    • 0.31
    • 0.12
    • 0.69
    • -0.31

  20. Why are ranks used instead of raw values in Spearman's calculation?

    • Removes outliers
    • Definition uses ranks
    • Normalises variance
    • Simplifies fractions

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