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# 7 Math Ch. 2

### Statistics: Analyzing Data

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

bar graph | a graphic form using bars to make comparisons of statistics |

box-and-whisker plot | a diagram that summarizes data using the median, the upper and lower quartiles, and the extreme values |

cluster | data that are grouped closely together |

data | pieces of information, often numerical, which are gathered for statistical purposes |

frequency table | a table for organizing a set of data that showers the number of pieces of data that fall within given intervals or categories |

histogram | a special kind of bar graph in which the bars are used to represent the frequency of numerical data that have been organized in intervals |

interquartile range | the range of the middle half of a set of numbers |

interval | on a scale, the difference between the greatest and least values in each category |

leaf | the second greatest place value of data in a stem-and-leaf plot |

line graph | a type of statistical graph using lines to show how values change over a period of time |

line plot | a diagram that shows the frequency of data, an X is placed above a number on a number line each time that number occurs in a set of data |

lower extreme | the least number of a set of data |

lower quartile | the median of the lower half of a set of numbers indicated by LQ |

mean | the sum of the data divided by the number of items in the data set |

measures of central tendency | numbers that are used to describe the center of a set of data including the mean, median, and mode |

median | the middle number in a set of data when arranged in numerical order |

mode | the number or numbers that appear most often in a set of data |

outlier | a piece of data that is quite separated from the rest from the rest of the data |

range | the difference between the greatest and least numbers in a data set |

scale | the set of all possible values of a given measurement, including the least and greatest numbers in the set, separated by equal intervals |

scatter plot | two sets of related data are plotted as ordered pairs on the same graph |

statistics | the study of collecting, organizing, and interpreting data |

stem | the greatest place value common to all the data values is used in a stem-and-leaf plot |

stem-and-leaf plot | a system used to condense a set of data where the greatest place value of the data forms the stem and the next greatest place value form the leaves |

upper extreme | the greatest number of a set of data |

upper quartile | the median of the upper half of a set of numbers, indicated by UQ |

Created by:
Miss Brinkoetter