Learning objective

Recognize the limitations of a weighted aggregate index number, including the impact of changes in weights due to shifts in consumption patterns.

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

Exam focus

Cambridge IGCSE StatisticsIndex numbers

Study support

Understand this objective

Quick explanation

This point belongs to Index numbers, especially Index numbers outcomes.
You need to be able to recognize the limitations of a weighted aggregate index number, including the impact of changes in weights due to shifts in consumption patterns.
The key ideas to know are Comment and Consider.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

CommentConsider

Why it matters

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

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

Question 1 of 7

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Paper 1Statistical Techniques3 marks

Description

The index uses weights from last year to combine price changes of several items. However, consumption patterns have shifted this year.

a
Explain why the weighted aggregate index number may not accurately reflect current changes in consumption.
Your answer
Aim for approximately 3 distinct marking points.
[3]

Revision notestopic notes

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