The key idea of probability at level 8 is investigating chance situations using probability concepts and distributions.
At level 8 students are investigating chance situations using concepts such as randomness, probabilities of combined events and mutually exclusive events, independence, conditional probabilities and expected values and standard deviations of discrete random variables, and probability distributions including the Poisson, binomial and normal distributions.
Students need to be able to model chance situations using both discrete and continuous probability distributions and apply probability concepts. They are using theoretical model probabilities and estimating probabilities from experiments as appropriate.
The three different types of chance situations described in level three need to be reinforced at this and other levels.
This key idea develops from the key idea of probability at level 7 where students are investigating chance situations involving continuous variables and using more sophisticated tools and ideas.
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