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# Alg I Glencoe L 2-7

### Alg I Glencoe L 2-7 Percent of Change

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

Percent of change | The ratio of the change in an amount to the original amount expressed as a percent. |

Percent of increase | The ratio of an amount of increase to the previous amount, expressed as a percent. |

Percent of decrease | The ratio of an amount of decrease to the previous amou nt, expressed as a percent. |

Quartiles | The values that divide a set of data into four equal parts. |

Deciles | Divides data into ten equal sections. |

Percentile | A measure that is used to report test data. Tells what percent of the total data values are below a given value. |

Mean | The sum of the numbers in a set of data divided by the number of items in the data set. |

Median | The middle number in a set of data when the data are arranged in numerical order. If the data set has an even number, find the mean of the two data points. |

Mode | The number(s) that appear most often in a set of data. |

Created by:
Phyllis Manning