Lesson 3p.04

3p.04 Use collected data and calculated probabilities to determine and interpret relative... Quiz: Pearson Edexcel Statistics, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3p.04, Use collected data and calculated probabilities to determine and interpret relative...: 20 multiple choice questions for the Pearson Edexcel GCSE Statistics (1ST0), Unit 3: Probability, written with Revision Ninja.

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The 20 questions

  1. What term describes the probability of an event occurring in a single group?

    • Absolute risk
    • Expected frequency
    • Relative risk
    • Experimental probability

  2. What does relative risk measure between two groups?

    • Product of probabilities
    • Ratio of risks
    • Difference in totals
    • Sum of risks

  3. In a driving test, 30 of 50 pupils pass with Instructor A. What is the absolute risk of passing with A?

    • 0.6
    • 0.2
    • 1.5
    • 0.4

  4. Using the same data, 20 of 50 pupils pass with Instructor B. What is the relative risk of passing with A compared with B?

    • 0.4
    • 1.5
    • 0.67
    • 0.6

  5. What does a relative risk value of exactly 1 indicate?

    • Higher first risk
    • Zero risk
    • Lower first risk
    • Equal risk

  6. What does a relative risk greater than 1 mean?

    • Lower first risk
    • Zero risk
    • Higher first risk
    • Equal risk

  7. Which fraction gives the formula for relative risk?

    • Risk A plus Risk B
    • Risk B over Risk A
    • Risk A over Risk B
    • Risk A minus Risk B

  8. The absolute risk of passing is 0.45 for 200 learners. How many are expected to pass?

    • 200
    • 45
    • 444
    • 90

  9. 12 of 40 patients recover on a treatment and 8 of 40 recover on control. What is the relative risk of recovery for the treatment?

    • 4
    • 0.67
    • 0.3
    • 1.5

  10. The absolute risk of an illness is 0.08 in a group of 500. How many people are expected to be ill?

    • 4
    • 80
    • 40
    • 400

  11. At junction A there are 60 accidents in 1000 journeys, and at junction B there are 30 in 1000. What is the relative risk at A compared with B?

    • 2
    • 3
    • 0.5
    • 30

  12. A relative risk is 2.5 and the risk in group B is 0.12. What is the risk in group A?

    • 0.14
    • 2.62
    • 0.3
    • 0.048

  13. Treatment success is 0.9 and control success is 0.6. What is the relative risk of success?

    • 0.67
    • 0.3
    • 1.5
    • 2.25

  14. A group of 300 has an absolute risk of 0.35. How many are expected to have the outcome?

    • 105
    • 35
    • 0.35
    • 300

  15. 18 passes are recorded from 60 attempts. What is the absolute risk of passing?

    • 3.33
    • 18
    • 0.3
    • 0.6

  16. Medicine A cures 45 of 100 and medicine B cures 30 of 100. What is the absolute difference in cure probability?

    • 0.15
    • 0.75
    • 1.5
    • 0.3

  17. A relative risk of 0.5 indicates what about group A compared to group B?

    • Half the risk
    • Zero risk
    • Equal risk
    • Double the risk

  18. Why can relative risk alone be misleading when assessing medical treatment effects?

    • Data is purely qualitative
    • Probabilities exceed one
    • Absolute risks are tiny
    • Samples are always biased

  19. Group A has risk 0.002 and group B has risk 0.001. What is the relative risk?

    • 0.001
    • 0.5
    • 2
    • 0.003

  20. What does absolute risk measure in a statistical context?

    • Total trial frequency
    • Risk in one group
    • Ratio of two groups
    • Difference between groups

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