Question 7
A student records the mass, in hundreds of kilograms, and the CO2 _2\,2 emission, in g/km, of 48 cars. The results are shown in the scatter diagram below.
a.[1]
State what the diagram shows about the 48 cars.
b.[2]
The student fits a single regression line to all 48 points. Explain why this line would be misleading.
c.[2]
State what the student should do instead, and state the extra information needed to do it.
2.2.2 Scatter diagrams and correlation Questions
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.