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GCSE Statistics
Averages and Spread
Learn averages and spread as part of collect, represent, summarise and compare data using charts, averages, spread and statistical diagrams.
Key idea
Look at the data type, choose an appropriate summary or diagram, then interpret the result in context.
What you will learn
Use averages and spread meaning confidently.
Use averages and spread representations confidently.
Use averages and spread methods confidently.
Use averages and spread applications confidently.
Success checklist
✓I can explain what averages and spread means.
✓I can choose a suitable method without being told.
✓I can show clear working and check my answer.
Worked example
Find the mean of 4, 7, 9 and 10.
Step 1
Add the values: 4 + 7 + 9 + 10 = 30.
Step 2
There are 4 values.
Step 3
30 ÷ 4 = 7.5.
Answer
7.5
Quick practice
Question 1
Find the median of 3, 8, 4, 10, 5.
Question 2
Find the range of 11, 18, 23, 24.
Question 3
Describe positive correlation in a scatter graph.
Related resources
These are linked to the wider Statistics topic for now.