Probability (Year 9)

Probability: The chance that something will happen. How likely it is that some event will occur. 

Relative frequency: How often something happens divided by all outcomes.   

Independent Event: meaning each event is not affected by any other events. 

Sample space: All the possible outcomes of an experiment.  

Two-way tables: are a type of frequency table used for organising data. It shows two categorical variables. 

Frequency trees: are a way of organising information.  

Probability trees: A diagram of lines connecting 'nodes', with path that go outwards to represent a combined probability of 2 or more events.