Plan a statistical investigation
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In an anonymous sample of 20 students, 7 walked to school. What percentage of this sample walked? Give your answer to 1 decimal places.
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Answer: 35.0%
- Sample proportion = 7/20.
- Multiply by 100.
- This is 35.0% of the sample, not proof about every student.
- 7 ÷ 20 = 7/20.
- 7/20 × 100 = 35.
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Curriculum reference
Victorian Curriculum F–10 Version 2.0
Pi Leo practice scope
Pose a question, collect appropriate data, analyse it and report conclusions with their limitations.
Read the official VCAA curriculum description (VC2M9ST05)
These quizzes practise concepts within this topic. Multiple-choice answers alone do not demonstrate drawing, conducting an investigation or using a digital tool.
Activities to practise beyond the quiz
- Supported by the guided activity; selecting an MCQ does not demonstrate this action.
- Supported by the guided activity; selecting an MCQ does not demonstrate this action.
- VC2M9ST05-C01Calculate a clear summary while identifying its sample.
- VC2M9ST05-C02Plan and conduct collection and analysis of different kinds of data.
- VC2M9ST05-C03Limit claims to what the design and data support.
- VC2M9ST05-C04Report findings and evaluate the evidence supporting conclusions.
- VC2M9ST05-C05Apply and explain plan a statistical investigation using calculate and explain each step.
- VC2M9ST05-C06Apply and explain plan a statistical investigation using compare evidence and check a claim.
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Subskills
These practice subskills map to the curriculum topic. Guided activities cover skills beyond multiple-choice questions.
Descriptor-derived subskills
- D01Summarise collected dataCalculate a clear summary while identifying its sample.
- D02How strong is the evidence?Limit claims to what the design and data support.
- D03Calculate and explain each stepApply and explain plan a statistical investigation using calculate and explain each step.
- D04Compare evidence and check a claimApply and explain plan a statistical investigation using compare evidence and check a claim.