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2.2.2 Scatter diagrams and correlation

2.2.2 Scatter diagrams and correlation

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Question 3

Talat fits a single regression line to all the cars in the AQA Large Data Set and uses it to predict the CO emission of a diesel car registered in Wales in 2010 whose CO2 _2\,2​ emission is 300 g/km.

a.

Using your knowledge of the Large Data Set, give three reasons why this prediction is not justified.

[3]
b.

Explain how the missing CO emission values could bias any line fitted to the diesel cars in the data set.

[2]
c.

State one thing Talat could do to investigate whether that bias is present.

[1]
Markscheme

2.2.2 Scatter diagrams and correlation Questions

  1. A Level
  2. /Maths
  3. /2.2.2 Scatter diagrams and correlation

157 exam-style questions on AQA A Level Maths 2.2.2 Scatter diagrams and correlation. Each one has a worked solution and a mark scheme showing where the marks go.

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