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# Midnimo Probability

### 7th Grade Probability Vocab

Term | Definition |
---|---|

Frequency | How often an event occurred |

Population | Entire collection of people, animals, plants, or things that someone is interested in learning about. |

Probability | A number between 0 and 1 that measures how likely an event will occur |

Probability Simulation | The use of a tool to generate outcomes that are consistent with a given probability model |

Random sample | A sample that uses a process to ensure that every different sample has the same chance of being selected |

Sample | A part of a population |

Sample Space | The set of all possible outcomes |

Average | Mean |

Compound event | Events made up of two or more simple events |

Outcome | Possible result of a probability experiment |

Trial | Each repetition or observation of an experiment |

Experimental probability | Ratio of the number of times an event occurs to the number of trials |

Impossible | There is no way this outcome can occur |

Certain | You will always get this outcome |

Equally likely | This outcome will occur exactly half of the time |

Formula for finding probability | Observed/total |

Theoretical probability | The number of favorable outcomes/ number of possible outcomes. What you expect to happen |

Fewer than | Everything less than |

At least | Everything greater than |

Tree diagram | Model used to show all possible outcomes |

Percent | Ratio comparing a number to 100 |

Favorable outcome | What you want to happen |