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A simplified or idealised description of a situation. The term model is used in two different ways in the Curriculum.
In the probability thread the use of “models of all the outcomes” refers to a list of all possible outcomes of a situation involving elements of chance and, at more advanced levels, a list of all possible outcomes and the corresponding probabilities for each outcome.
At Level Eight in the statistical investigation thread, an achievement objective refers to “appropriate models (including linear regression for bivariate data and additive models for time-series data)”. Used in this way, a model is an idealised description of the underlying system the data was taken from and the model is intended to match the data closely.
See: probability function (for a discrete random variable)
Curriculum achievement objectives references
Statistical investigation: Level 8
Probability: Levels 3, 4, (5), (6), (7), (8)
