Cumulative Frequency

Cumulative Frequency Quiz

Spec E9.6 · Cambridge IGCSE Maths: Quiz

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5 questions, one answer each

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  1. 1. Class frequencies are 6, 9, 14, 11. What is the cumulative frequency after the third class?

    • A. 29
    • B. 23
    • C. 40
    • D. 14

  2. 2. On a cumulative frequency diagram, points should be plotted against which value of each class?

    • A. The upper class boundary
    • B. The lower class boundary
    • C. The class midpoint
    • D. The class width

  3. 3. For a data set of 60 values, at what cumulative frequency do you read off to estimate the median?

    • A. 30
    • B. 60
    • C. 15
    • D. 45

  4. 4. A cumulative frequency diagram gives Q1=18Q_1 = 18 and Q3=42Q_3 = 42. What is the interquartile range?

    • A. 24
    • B. 60
    • C. 21
    • D. 30

  5. 5. Why should a cumulative frequency curve never decrease as you move right?

    • A. Because cumulative frequency is a running total, which can only stay the same or increase
    • B. Because the x-axis represents time
    • C. Because all frequencies must be equal
    • D. Because the curve must be a straight line

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