Learning objective

Represent a grouped frequency distribution using a frequency polygon and interpret the resulting graph, including the ability to compare two frequency distributions.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE StatisticsFrequency distributions

Study support

Understand this objective

Quick explanation

This point belongs to Frequency distributions, especially Frequency distributions outcomes.
You need to be able to represent a grouped frequency distribution using a frequency polygon and interpret the resulting graph, including the ability to compare two frequency distributions.
The key ideas to know are Plot, Compare, and Interpret.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

PlotCompareInterpret

Why it matters

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

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 1Statistical Techniques6 marks

Data Table

Number of students in each score interval

a
Calculate the midpoints of each score interval.
Your answer
Aim for approximately 2 distinct marking points.
[2]
b
Plot a frequency polygon using the midpoints and frequencies. Include points with zero frequency before the first and after the last midpoint to close the polygon.
Your answer
Aim for approximately 4 distinct marking points.
[4]

Revision notestopic notes

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