Lesson 2.02i

2.02i Selecting and critiquing data presentation Quiz: OCR Maths, Unit 12

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 2.02i, Selecting and critiquing data presentation: 20 multiple choice questions for the OCR Maths (H240), Unit 12: Data Presentation and Interpretation, written with Revision Ninja.

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The 20 questions

  1. What term describes the process of identifying and correcting incorrect or missing values in a dataset?

    • Data cleaning
    • Data collection
    • Data sampling
    • Data extrapolation

  2. In box plots, what formula defines the upper limit for identifying outliers using quartiles?

    • Q3 + 2 × IQR
    • Q3 + 1.5 × IQR
    • Q3 + IQR
    • Q1 + 1.5 × IQR

  3. If Q1 is 12 and the IQR is 8, what is the lower boundary for outliers?

    • 4
    • 0
    • 6
    • 2

  4. If mean is 40 and standard deviation is 6, what is the upper outlier boundary using 2 SDs?

    • 52
    • 46
    • 58
    • 64

  5. If mean is 25 and standard deviation is 4, what is the lower outlier boundary using 2 SDs?

    • 17
    • 13
    • 9
    • 21

  6. Which rule defines outliers using standard deviation from the mean for OCR A level maths?

    • Over 3 SDs
    • Over 2 SDs
    • Over 1 SD
    • Over 1.5 SDs

  7. Which statistical diagram clearly shows the median, quartiles, and individual outliers of a dataset?

    • Box plot
    • Cumulative frequency graph
    • Scatter diagram
    • Histogram

  8. What diagram is most suitable for evaluating the relationship between two continuous variables?

    • Histogram
    • Bar chart
    • Pie chart
    • Scatter diagram

  9. On a histogram, which property of each bar is proportional to the class frequency?

    • Height
    • Area
    • Perimeter
    • Width

  10. In probability notation, what does the expression P(A') represent?

    • Conditional event A
    • Union of A
    • Complement of A
    • Intersection of A

  11. If events A and B are mutually exclusive, what is the value of P(A ∩ B)?

    • 0.5
    • 0
    • 1
    • 0.25

  12. If P(A) = 0.2 and P(B) = 0.5 are mutually exclusive, what is P(A ∪ B)?

    • 0.7
    • 0.3
    • 0.8
    • 0.1

  13. Which formula correctly tests whether two events A and B are independent?

    • P(A ∩ B) = P(A)P(B)
    • P(A ∪ B) = P(A)P(B)
    • P(A ∩ B) = 0
    • P(A|B) = P(B|A)

  14. If P(A) = 0.4 and P(B) = 0.3 are independent, what is P(A ∩ B)?

    • 0.12
    • 0.7
    • 0.82
    • 0.1

  15. What does the probability notation P(A|B) represent in conditional probability?

    • A or B
    • A given B
    • A and B
    • B given A

  16. Which expression correctly defines the conditional probability P(A|B)?

    • P(A ∩ B) / P(A)
    • P(A ∪ B) / P(B)
    • P(A ∩ B) / P(B)
    • P(A) × P(B)

  17. If P(A ∩ B) = 0.18 and P(B) = 0.6, what is P(A|B)?

    • 0.42
    • 0.78
    • 0.3
    • 0.108

  18. In a Venn diagram, which region represents event A occurring but not event B?

    • A ∩ B'
    • A ∪ B
    • A' ∩ B
    • A ∩ B

  19. Why is a line graph unsuitable for showing categorical data without order?

    • Requires negative values
    • Shows accurate totals
    • Suggests continuous trend
    • Hides the mean

  20. How should an impossible recorded measurement, like a height of 18 metres, be cleaned?

    • Remove or correct
    • Include in mean
    • Multiply by ten
    • Set to zero

All OCR Maths quizzes