Algebra I: Worksheet 9-6



Algebra I: Worksheet Quartiles

For each set of data, find the median, lower quartile (Q1), upper quartile (Q3), inner quartile range and five number summary.

1) 5, 7, 8, 12, 17, 19, 21, 28, 29, 30, 34, 36, 38, 40, 42

median: ______________

lower quartile: _________

upper quartile: _________

Inner Quartile Range:___________

Five Number summary: _________________________________

2) 100, 103, 104, 104, 106, 108, 112, 114, 117, 119, 120, 128, 129, 130, 132, 133,

133, 134, 135, 137, 138, 139, 140, 143

median: ______________

lower quartile: _________

upper quartile: _________

Inner Quartile Range:___________

Five Number summary: _________________________________

3) 80, 81, 81, 85, 85, 86, 88, 90, 91, 95, 96, 99

median: ______________

lower quartile: _________

upper quartile: _________

Inner Quartile Range:___________

Five Number summary: _________________________________

4) 6, 8, 9, 12, 15, 20, 21, 22, 23, 25, 29, 35, 36, 39, 46, 49, 52, 55, 59, 65

median: ______________

lower quartile: _________

upper quartile: _________

Inner Quartile Range:___________

Five Number summary: _________________________________

5) The accompanying frequency table shows the scores on a math test.

|Interval |Frequency |

|91-100 |2 |

|81-90 |8 |

|71-80 |12 |

|61-70 |0 |

|51-60 |7 |

|41-50 |3 |

Based on the frequency table, find the interval that contains the:

Lower quartile: _____________

median: __________________

Upper Quartile: ____________

Inner Quartile Range:___________

Five Number summary: _________________________________

6) The accompanying frequency table shows the ages of 40 people to enter a theater.

|Interval |Frequency |

|0-9 |8 |

|10-19 |7 |

|20-29 |4 |

|30-39 |11 |

|40-49 |5 |

|50-59 |3 |

|60-69 |2 |

Based on the frequency table, find the interval that contains the:

Lower quartile: _____________

median: __________________

Upper Quartile: ____________

Inner Quartile Range:___________

Five Number summary: _________________________________

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