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Learning objective

Identify the class limits, boundaries, midpoints, and widths for a grouped frequency distribution, noting that these will differ for discrete and continuous data.

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE StatisticsFrequency distributions

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Quick explanation

Identify the class limits, boundaries, midpoints, and widths for a grouped frequency distribution, noting that these will differ for discrete and continuous data

  • This point belongs to Frequency distributions, especially Frequency distributions outcomes.
  • You need to be able to identify the class limits, boundaries, midpoints, and widths for a grouped frequency distribution, noting that these will differ for discrete and continuous data.
  • The key ideas to know are Identify, Describe, and State.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

IdentifyDescribeState

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This objective helps connect Frequency distributions outcomes to exam-style questions, flashcards, and revision notes for Frequency distributions.

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Practice Questions7 linked questions

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Paper 1 structured question: Frequency distributions

Paper 1Statistical Techniques2 marks

Data Table

Grouped Frequency Distribution Classes

Classes for continuous data

ClassLower Class LimitUpper Class Limit
10–191019
20–292029
30–393039
  1. a

    Identify the class boundaries for the class 10–19.

    Aim for approximately 2 distinct marking points.

    [2]
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