probability. probability the chance or likelihood that an event will occur. - it is always a number...

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Probability

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$Page 1: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

Probability

$Page 2: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

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.

$Page 3: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

•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.

$Page 4: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

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

$Page 5: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

Sample space• List of all possible

outcomes

$Page 6: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

Theoretical probability

• Based on considering all possible outcomes

experimental probability• Based on considering all

previous outcomes– Real data

$Page 7: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

Probability of multiple events

•Find the probability of each individual event

•Multiply each probability together

$Page 8: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

Independent Events• The outcome of one event

DOES NOT affect the outcome of the next event

$Page 9: Probability. probability The chance or likelihood that an event will occur. - It is always a number between zero and one. - It is stated as a fraction,$

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!

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