# Probability: Level 7

The key idea of probability at level 7 is investigating chance situations involving continuous variables and using more sophisticated tools and ideas.

At level 7 students are exploring chance situations involving continuous variables, for example, using a technology experiment to generate an estimated probability distribution of the angle of the pointer from north for a spinner (uniform distribution) or a physical experiment (rice bombing) to generate an estimated probability distribution of the absolute horizontal distance from the target point’s line (normal distribution).

Students are investigating chance situations using tools such as probability tree diagrams, two way tables, simulations and technology.

The three different types of chance situations described in level three need to be reinforced at this and other levels.

Link to statistical investigations: Students are using results from statistical investigations to explore and ascertain risk and relative risk and are interpreting and communicating risk ideas.

This key idea develops from the key idea of probability at level 6 where students are exploring chance situations involving discrete random variables.

This key idea is extended in the key idea of probability at level 8 where students are investigating chance situations using probability concepts and distributions.