Read a survey report critically
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Log in to continueIdentify numerical and categorical variables, inspect collection methods and estimate population summaries from samples.
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A random sample of five bus travellers reports these travel times in minutes: [10, 12, 13, 15, 20]. Use the sample mean to estimate the population mean travel time.
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Answer: 14
- Add the five times: 70 minutes.
- Divide by 5: 14 minutes.
- This is an estimate from the sample, not the exact population mean.
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Curriculum reference
Victorian Curriculum F–10 Version 2.0
Pi Leo practice scope
Identify numerical and categorical variables, inspect collection methods and estimate population summaries from samples.
Read the official VCAA curriculum description (VC2M9ST01)
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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.
- VC2M9ST01-C01Use a sample mean while recognising sampling uncertainty.
- VC2M9ST01-C02Analyse an actual media survey and its data-collection method.
- VC2M9ST01-C03Calculate a median for a category without mixing incomparable groups.
- VC2M9ST01-C04Evaluate numerical and categorical survey variables and communicate limitations.
- VC2M9ST01-C05Apply and explain read a survey report critically using calculate and explain each step.
- VC2M9ST01-C06Apply and explain read a survey report critically using compare evidence and check a claim.
- VC2M9ST01-C07Apply and explain read a survey report critically using work backwards from what is known.
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Subskills
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Descriptor-derived subskills
- D01Estimate a population meanUse a sample mean while recognising sampling uncertainty.
- D02Compare a defined categoryCalculate a median for a category without mixing incomparable groups.
- D03Calculate and explain each stepApply and explain read a survey report critically using calculate and explain each step.
- D04Compare evidence and check a claimApply and explain read a survey report critically using compare evidence and check a claim.
- D05Work backwards from what is knownApply and explain read a survey report critically using work backwards from what is known.