01 / QUICK RECAP
Connect the ideas.
- Define a population and sampling frame before choosing a sample.
- Use sample proportions to estimate cautiously, never as exact census counts.
- Compare centre, spread, shape and overlap, using common scales.
- Retain repeated data and investigate unusual observations before correcting errors.
- Check axes, denominators and selection methods before accepting a claim.
- Report evidence and limitations; association alone does not establish causation.
02 / PRACTICE TESTS
Put it together.
Choose a paper and show your working.
Statistics — Practice test 1
A gradual review of sampling, displays, summaries and evidence-based conclusions.
16 questions · 48 marks · 55 minutes · Scientific calculatorStatistics — Practice test 2
Use different representations and missing-value questions, then evaluate an investigation.
16 questions · 46 marks · 55 minutes · Scientific calculatorStatistics — Applications test
Use supplied school and community data to challenge claims and design defensible conclusions.
16 questions · 50 marks · 60 minutes · Scientific calculator
Curriculum reference & lesson scope
Australian Curriculum v9 / SA Curriculum Mathematics
Year 9 sampling, comparative distributions, centre/spread/outliers, displays, critique and statistical investigations.
Official curriculum source ↗