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# Day Statistics Terms

### High School Math 1 Chapter 6

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

Multiplication counting principle | If 1 event can occur in m ways and another can occur in n ways, the number of ways both can occur together is m x n. |

Addition counting principle | If the possibilities being counted can be divided into groups with no possibilities in common, the total number of possibilities is the sum. |

Permutation | An arrangement of objects in which order is important. |

Combination | A selection of objects in which order is not important. |

Compound event | Combines 2 or more events, using the word and or the word or. |

Mutually exclusive events | No common outcomes. |

Overlapping events | At least one common outcome. |

Independent events | One event has no effect on the other. |

Dependent events | One event affects the outcome of the other. |

Conditional probability | If events are dependent, the probability the second one will occur, given the results of the first one. |

Expected value | The sum of the probabilities of an event multiplied by the corresponding outcomes. |

Survey | Study of one or more characteristics of a group. |

Population | The entire group you want information about. |

Random sample | Every population member has an equal chance of being selected. |

Stratified random sample | Population is divided into groups, and members are selected at random from each group. |

Systematic sample | A rule (such as every 3rd one) is used to select members of the population. |

Convenience sample | Easily accessible members of the population are selected. |

Self-selected sample | Members select themselves by volunteering. |

Representative sample | Sample accurately relects the characteristics of the population. |

Biased sample | Sample doesn't represent the population. |

Biased question | Encourages a particular response. |

Measure of central tendency | Indicator of the middle of the data. |

Measure of dispersion | Indicator of how much the data is spread. |

Mean absolute deviation | Average distance from the mean. |

Quartile | Median of an ordered data set |

Upper quartile | Median of the upper half of an ordered data set. |

Lower quartile | Median of the lower half of an ordered data set. |

Interquartile range | Difference between the upper quartile and the lower quartile of a data set. |

Created by:
janeday