What you'll learn
Handling and interpreting data.
Key skills
- Mean, median, mode and range; averages from frequency tables and grouped data (using midpoints).
- Charts: bar charts, pie charts and scatter graphs.
- Correlation and the line of best fit.
Exam tips
- For grouped-data means, divide Σ(fx) by Σf.
- Describe correlation by strength and direction.
Common mistakes
- Dividing by the number of rows instead of Σf.
- Claiming correlation proves causation.