Leon wants to test whether the proportion of diesel cars in England with a CO emission above 0.5 g/km has fallen since 2010. He proposes to answer this using the AQA Large Data Set.
Using your knowledge of the Large Data Set, give two reasons why Leon's investigation cannot be carried out with this data set.
Leon suggests that taking a much larger sample from the data set would solve the problem. Explain why it would not.
State an investigation about CO emissions that Leon could carry out using the Large Data Set, and state the population his conclusion would apply to.
28 exam-style questions on AQA A Level Maths 2.1 K: Statistical sampling, covering 2.1.1 Populations, samples and sampling techniques. Each one has a worked solution and a mark scheme showing where the marks go.