Cumulative Frequency Diagrams

Cumulative Frequency Diagrams Quiz

Spec 6.1–2 · Edexcel IGCSE Maths: Quiz

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  1. 1. When plotting a cumulative frequency graph, which value should you use for the xx-coordinate of each class interval?

    • A. The midpoint
    • B. The lower bound
    • C. The upper bound
    • D. The frequency

  2. 2. What shape does a correctly drawn cumulative frequency curve take?

    • A. A straight line
    • B. A smooth S-shaped curve that never decreases
    • C. A U-shaped curve
    • D. A bar chart

  3. 3. A data set has n=80n = 80. At what cumulative frequency value should you read off the lower quartile, Q1Q_1?

    • A. 10
    • B. 20
    • C. 40
    • D. 60

  4. 4. From a cumulative frequency graph, Q1=12Q_1 = 12 and Q3=27Q_3 = 27. What is the interquartile range?

    • A. 39
    • B. 15
    • C. 19.5
    • D. 27

  5. 5. Two classes' exam marks are compared: Class A has median 62 and IQR 8; Class B has median 58 and IQR 20. Which statement correctly compares them in context?

    • A. Class A scored higher on average and had more consistent marks than Class B
    • B. Class A scored lower on average and had more consistent marks than Class B
    • C. Class B scored higher on average but had more consistent marks than Class A
    • D. The two classes performed identically since only the median differs

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