Learning objective

Draw a line of best fit on a scatter diagram, using both visual estimation and the method of semi-averages, ensuring an even number of data pairs for the latter.

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

Exam focus

Cambridge IGCSE StatisticsBivariate distributions

Study support

Understand this objective

Quick explanation

This point belongs to Bivariate distributions, especially Bivariate distributions outcomes.
You need to be able to draw a line of best fit on a scatter diagram, using both visual estimation and the method of semi-averages, ensuring an even number of data pairs for the latter.
The key ideas to know are Sketch and Show.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

SketchShow

Why it matters

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

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

Question 1 of 7

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0 of 5 attempted

Paper 1Statistical Techniques5 marks

Data Table

Data pairs showing hours studied and marks obtained by 8 students.

a
Calculate Use the method of semi-averages to find the equation of the line of best fit in the form y = mx + c.
Your answer
Aim for approximately 5 distinct marking points.
[5]

Revision notestopic notes

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