1. DISCUSS regression and correlation
Nuffield Free-Standing Mathematics Activity
DISCUSS regression and correlation
CC Rudolf Stricker

2. DISCUSS regression and correlation
Height
Age of plant
Plant heights
How does the height of a plant depend on its age?
How does the value of a car depend on its age?
Price
Age of car
Depreciation in value of cars
This activity is about finding relationships between variables and measuring their strength.

3. DISCUSS regression and correlation
Use the following online tutorial to learn about regression and correlation:
The student sheets tell you which parts to do and which to leave out.

4. DISCUSS regression and correlation
Reflect on your work
Explain what is meant by ‘regression’ and ‘correlation’.
What is the difference between interpolation and extrapolation?
If you find that r = 1, what can you say about the relationship between the variables?
What if r = –1?
What might a value of r near to zero indicate?
Correlation does not imply causation. Explain what this means. Suggest a real-life example.