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# Ch. 2 Stats/Graphs

### Mrs. Bullecks Statistics and Graphs

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

average | the sum of two or more quantities divided by the number of quantities; the mean |

bar graph | a graph using bars to compare quantities. The height or length of each bar represents a designated number |

frequency | the number of times an item occurs |

graph | a visual way to display data |

horizontal axis | the axis on which the categories or values are shown in a bar and line graph. |

integers | the whole numbers and their opposites. |

key | a sample data point used to explain the stems and leaves in a stem-and-leaf plot |

line graph | a graph used to show how a set of data changes over a period of time. |

line plot | a diagram that shows the frequency of data on a number line |

mean | the sum of the numbers in a set of data divided by the number of pieces of data |

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

median | the middle number in a set of data when the data are arranged in numberical order. If the data has an even number, the median is the mean of the two middle numbers. |

mode | the number(s) or item(s) that appear most often in a set of data. |

negative numbers | a number that is less than zero |

opposites | numbers that are the same distance from zero in opposite directions. |

outliers | a value that is much higher or much lower than the other values in a set of data |

positive numbers | a number that is greater than zero |

range | the difference between the greatest number and the least number in a set of data. |

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 forms the leaves. |

vertical axis | the axis on which the scale and interval are shown in a bar or line graph. |

Created by:
Bullecks