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# probability - scms

### Probability - scms

Question | Answer |
---|---|

experiment | an activity in which results are observed |

trial | observation of an experiment |

outcome | a possible result of an experiment |

sample space | all possible outcomes of an experiment |

event | any set of one or more outcomes |

probability | a number from 0 to 1 (0% to 100%) that describes how likely an event is to occur |

impossible | an event that can never happen - probability is 0% |

certain | an event that is sure to happen - probability is 100% |

experimental probability | ratio of the number of times an event occurs to the total number of trials |

theoretical probability | ratio of the number of equally likely outcomes in an event to the total number of possible outcomes |

equally likely | outcomes that have the same probability |

fair | all outcomes of an experiment are equally likely |

mutually exclusive | two event that cannot occur in the same trial of an experiment |

disjoint event | two event that cannot occur in the same trial of an experiment |

compound event | an event made up of two or more simple events. |

independent event | events for which the outcome of one event does not affect the probability of the other |

tree diagram | a branching diagram that shows all possible combinations or outcomes of an event |

Fundamental Counting Principles | if one event has m possible outcomes and a second event has n possible outcomes after the first event has occured, then there are m.n total possible outcomes for the two events |

Addition Counting Principles | If one group contains m objects and a second group contains n objects, and the groups have no objects in common, then there are m+n total objects to choose from |

Created by:
susan.a.kesler