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

Sample Space | List of all possible outcomes |

Event | Any collection of outcomes from some chance process (A, B, C,…) |

Probability model | Description of some chance process that consists of 2 parts= sample space and a probability for each outcome(Table) |

Discrete | Countable # of outcomes |

Continuous # | Uncountable # of outcomes |

Sample w/replacement | Put back what we you took out (independent) |

Mutually Exclusive | Have no outcomes in common AND can never occur at the same time if P(A and B) = 0 |

Disjoint events equation (or mutually exclusive rule) | P(A or B)= P(A) + P(B) |

Probability an event WON'T occur | P(A^c)= 1-P(A)(One minus the probability that it will occur) |

P (A or B) | A U B |

P (A and B) | A (upside down U) B |

P( A or B) equation: | P(A) + P(B) – P(A and B) |

Conditional Probability | Given the denominator, not the whole |

P (A | B) = | P(A and B) / P(A) |

General multiplication rule | Used to check if probabilities are mutually exclusive |

General multiplication rule Equation | P(A and B) = P(A) a?? P(B | A) |

AND | Multiply |

OR | Add |

Independent | One event doesn't change the probability that the other will happen |

Multiplication Rule for Independent Events | P( A and B) = P(A) a?? P(B) |

Stats Probability