Measure

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An amount or quantity that is determined by measurement or calculation. The term ‘measure’ is used in two different ways in the Curriculum.

One use is in the terms; measure of centre, measure of spread and measure of proportion, where these measures are calculated quantities that represent characteristics of a distribution. The use of “using displays and measures” in the Level Six (statistical investigation thread) achievement objective is a reference to measures of centre, spread and proportion.

The other use applies to a statistical investigation. The investigator decides on a subject of interest and then decides the aspects of it that can be observed. These aspects are the ‘measures’.

Example

An investigator decides that ‘well-being’ is a subject of interest and chooses ‘happiness’ to be one aspect of well-being. Happiness could be measured by the variable ‘number of times a person laughs in a day, on average’.

Curriculum achievement objectives references

Statistical investigation: Levels 5, 6, 7, (8)

Statistical literacy: Levels 5, (6), (7), (8)