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2.2 L: Data presentation and interpretation

2.2 L: Data presentation and interpretation

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Question 83

For a sample of 200 cars there is positive correlation between a car's age, in years, and its CO emission. A student concludes that a car's engine produces more CO as the car gets older.

a.

Suggest a third factor that could be responsible for the correlation.

[1]
b.

Explain how that factor could produce the correlation even if a car's age had no effect at all on its CO emission.

[2]
c.

Describe how the student could investigate the effect of age alone.

[2]
Markscheme

2.2 L: Data presentation and interpretation Questions

  1. A Level
  2. /Maths
  3. /2.2 L: Data presentation and interpretation

244 exam-style questions on AQA A Level Maths 2.2 L: Data presentation and interpretation, covering 2.2.1 Single-variable data diagrams, 2.2.2 Scatter diagrams and correlation, 2.2.3 Central tendency, variation and standard deviation, 2.2.4 Outliers and cleaning data, and 2.2 L: Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.

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