Talat wants to use a random sample of 25 diesel cars from the Large Data Set to investigate whether the proportion of diesel cars in England with CO emissions of more than 0.5 g/km has changed.
Using your knowledge of the Large Data Set, give two reasons why it is not possible for Talat to carry out this investigation.
State one question about the CO emissions of diesel cars that Talat could investigate using the Large Data Set, and describe briefly how he could use the data set to investigate it.
Explain why a conclusion Talat draws from the Large Data Set should not be applied to all cars registered in England.
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.