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Find the mean of these recorded values: 4, 4, 6, 8, 13.
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Answer: 7
- Add all values and divide by how many there are.
- The mean is 7.
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Curriculum reference
Victorian Curriculum F–10 Version 2.0
Pi Leo practice scope
Calculate centre and spread and consider what each measure communicates.
Read the official VCAA curriculum description (VC2M7ST01)
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- Supported by the guided activity; selecting an MCQ does not demonstrate this action.
- VC2M7ST01-C01The mean is sum divided by count. It uses every value, so unusually high or low observations can change it substantially.
- VC2M7ST01-C02Order observations to find an odd- or even-count median, identify modes from frequencies, and compare ranges using the same measure.
- VC2M7ST01-C03The mode is most frequent and the range is maximum minus minimum. Neither alone describes every feature of the distribution.
- VC2M7ST01-C04Acquiring discrete/continuous data and justifying a useful choice of central tendency in context.
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Descriptor-derived subskills
- D01Find the equal-share averageThe mean is sum divided by count. It uses every value, so unusually high or low observations can change it substantially.
- D02Compare middle values, modes and spreadOrder observations to find an odd- or even-count median, identify modes from frequencies, and compare ranges using the same measure.
- D03Describe numerical values and variationThe mode is most frequent and the range is maximum minus minimum. Neither alone describes every feature of the distribution.