probability. probability the chance or likelihood that an event will occur. - it is always a number...
TRANSCRIPT
Probability
probability
• The chance or likelihood that an event will occur.
- It is always a number between zero and one.
- It is stated as a fraction, decimal, or percent.
•A Probability of Zero is saying that there is no chance of it happening.
•A Probability of One is saying that the event will always happen.
If the event doesn’t occur every time, or none of the time, then we use this formula to determine the probability:
P (event) = # desired outcomes # total possible outcomes
Sample space• List of all possible
outcomes
Theoretical probability
• Based on considering all possible outcomes
experimental probability• Based on considering all
previous outcomes– Real data
Probability of multiple events
•Find the probability of each individual event
•Multiply each probability together
Independent Events• The outcome of one event
DOES NOT affect the outcome of the next event
dependent Events• The outcome of one event
DOES affect the outcome of each subsequent event because it changes the sample space.
• Assume each event is a success!