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# Unit 10 Data/Graphs

### Mean, Median, Mode, Range, IQR

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

Data | collected information organized in a graph |

Interquartile Range | difference between quartile 3 and quartile 1; measure of spread |

Lower Quartile | median of the first half of numbers in the set of data |

Mean | average; the sum of all the values in the set divided by the amount of numbers given in a set of data |

Measures of Center | measures that identify the central area or the middlemost value of a set of numbers; mean, median, and mode |

Measures of Spread | measures that describe how spread out or scattered the values in a set of data are; range and interquartile range |

Median | middlemost number in a set of data |

Mode | number most often used in a set of data |

Range | difference between the highest value and lowest value in a set of data |

Upper Quartile | the median of the second half of numbers in the set of data |

Box Plot | graph using a number line to show the distribution of data; median, lower and upper quartiles |

Dot Plot | graph using a number line using a dot to show each number in the data set |

Frequency Table | table used to show how often a number occurs in the data set |

Histogram | graph using bars to show the frequency of numbers in the data set |

Horizontal | a line going side to side |

Intervals | numbers between two specific values |

Outliers | data value way higher or way lower than most of the numbers in a data set |

Skewed | when data is off to the right or off to the left |

Stem and Leaf Plot | graph used to display data based on place value |

Symmetrical | shape of a graph when most of the data values are grouped in the middle and tail off equally to both sides |

Uniform | shape of a graph when all values are equal across the graph |

Vertical | a line going up and down |