Data, graphs and averages. Easy marks — until students rush and read the wrong axis. Classic.

Quick Summary

Statistics is about representing and interpreting data. The calculations are usually simple; the reading is where students get trapped.

• ✅ Must-know skills
• ⚠️ Common mistakes

First-Move Decision Flow

• What is the data asking?

Exam Practice

• Easy
• Medium
• Hard

Revision Checklist

• [ ] I can calculate mean, median, mode and range.
• [ ] I can use frequency tables.
• [ ] I can estimate mean using midpoints.
• [ ] I can interpret cumulative frequency and box plots.
• [ ] I compare data using both average and spread.