SAS 13 TREE DIAGRAMS AND FUNDAMENTAL PROBABILITY

Event

• an occurrence or outcome in a probability experiment

outcome

• a possible result of an event 

favorable outcomes

• outcomes that satisfy the event’s condition

equally likely outcomes

outcomes with the same probability occurring

independent events

• events that do not affect each other’s outcomes

combined probability 

• the probability of a sequence of events, calculated by multiplying the probabilities along the branches of a tree diagram

tree diagram

• map of all possible outcomes

• is a picture used for making smart choices, figuring out values, or calculating chances of things happening

probability

• branch of mathematics that deals with the likelihood or chance or events happening

• it helps us understand the measure uncertainty in everyday life

• basic concepts such as

experiments

outcomes

events

sample spaces

experiment

• the process or action that leads to a result or outcome

sample space

is a set of all possible outcomes of an experiment

event 

• is a subset of the sample space 

• it represents one or more outcomes 

addition rule

• helps when events are connected, like when one thing happening affects another

• it also works for events that can both happen or events that can’t both happen at the same time

multiplication rule 

• is for when events don’t affect each other