Investigate a numerical question
Practise online with Next and Previous buttons, worked explanations and a report of the questions to review.
Log in to continueUse primary or secondary data to analyse a distribution and report a defensible finding.
One-question preview
Choose one answer
Try this sample, or continue to the online quiz for a practice set with Next and Previous buttons.
A class takes its own measurements of paper-plane distances for the investigation it is doing now. What is the data source?
Invented practice scenario and data.
Show worked steps
Answer: Primary data collected for this investigation
- The class collected the observations directly for its current question.
- “Primary” describes the source, not a guarantee of accuracy or representativeness.
This is a question from this topic’s quiz. Preview answers are not saved.
Scratchpad
Working out
Draw with a finger, pen or mouse, or type your working below.
Your working stays on this page. It is not submitted or saved, and clears when you leave or reload.
Curriculum reference
Victorian Curriculum F–10 Version 2.0
Pi Leo practice scope
Use primary or secondary data to analyse a distribution and report a defensible finding.
Read the official VCAA curriculum description (VC2M7ST03)
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.
- Supported by the guided activity; selecting an MCQ does not demonstrate this action.
- VC2M7ST03-C01Primary data are collected directly for the current investigation. Secondary data already exist from another collection. Check definitions, dates, units and selection methods before comparing them. A rounded measurement can still represent a continuous quantity.
- VC2M7ST03-C02Mean uses every value; median is the middle ordered value; range is maximum minus minimum. Look at the distribution and unusual values as well. A large valid observation can pull the mean towards it without moving the median as much.
- VC2M7ST03-C03Compare like with like and keep source information. Describe observed changes without claiming they prove a universal improvement. Check unusual observations rather than deleting inconvenient data. Report summary measures, shape, sample limits and any differences in the collection conditions.
- VC2M7ST03-C04Planning/conducting an investigation using primary and secondary numerical data, analysing distributions and reporting contextual findings.
- VC2M7ST03-C05Actually collecting observations or survey responses and using spreadsheet software.
- VC2M7ST03-C06Creating and communicating an original statistical investigation, rather than selecting an MCQ response.
Learn with worked examples
Help with this topic
Skills in this topic
Traceable coverage
Subskills
These practice subskills map to the curriculum topic. Guided activities cover skills beyond multiple-choice questions.
Descriptor-derived subskills
- D01Plan and check numerical sourcesPrimary data are collected directly for the current investigation. Secondary data already exist from another collection. Check definitions, dates, units and selection methods before comparing them. A rounded measurement can still represent a continuous quantity.
- D02Use summaries with the shapeMean uses every value; median is the middle ordered value; range is maximum minus minimum. Look at the distribution and unusual values as well. A large valid observation can pull the mean towards it without moving the median as much.
- D03Make a defensible investigation reportCompare like with like and keep source information. Describe observed changes without claiming they prove a universal improvement. Check unusual observations rather than deleting inconvenient data. Report summary measures, shape, sample limits and any differences in the collection conditions.