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Learning objective

Identify trends in data and manually draw a trend line using moving average values.

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

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  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE StatisticsTime series

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Quick explanation

Identify trends in data and manually draw a trend line using moving average values

  • This point belongs to Time series, especially Time series outcomes.
  • You need to be able to identify trends in data and manually draw a trend line using moving average values.
  • The key ideas to know are Identify and Sketch.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

IdentifySketch

Why it matters

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

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Practice Questions7 linked questions

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Paper 1 structured question: Time series

Paper 1Statistical Techniques3 marks

Data Table

Monthly Sales Data

Sales units for 7 months

MonthSales (units)
1120
2130
3125
4140
5135
6150
7145
  1. a

    Calculate the 3-month moving averages for months 2 to 6.

    Aim for approximately 3 distinct marking points.

    [3]
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