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GCSE Statistics
Sampling and Surveys
Learn sampling and surveys 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 sampling and surveys meaning confidently.
Use sampling and surveys representations confidently.
Use sampling and surveys methods confidently.
Use sampling and surveys applications confidently.
Success checklist
✓I can explain what sampling and surveys 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.