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Math Help - Five Number Summary

  1. #1
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    Post Five Number Summary

    Dataset: 34, 37, 40, 43, 46, 49, 50, 53, 55, 59, 60, 61, 61, 63, 64, 67, 71, 71, 72, 76

    n = 20

    Min = 34
    Q1 = 46
    Median = 59.5
    Q3 = 67
    Max = 76

    This is all right, isn't it?


    ---------------------------------------------------------------------------------------------------

    Dataset: 0, 1, 2, 3, 3, 3, 3, 4, 4, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 11, 12

    Median = 5
    Q1 = 3.5
    Q3 = 7
    IQR = 3.5
    Upper Boundary = 29.75
    Lower Boundary = 7

    I don't think that the boundaries are right, as they make 12 results outliers.

    ---

    Please show me how to work these out.
    Last edited by ibenot1337; August 29th 2009 at 01:21 AM. Reason: Added another question.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by ibenot1337 View Post
    Dataset: 34, 37, 40, 43, 46, 49, 50, 53, 55, 59, 60, 61, 61, 63, 64, 67, 71, 71, 72, 76

    n = 20

    Min = 34
    Q1 = 46
    Median = 59.5
    Q3 = 67
    Max = 76

    This is all right, isn't it?
    What is the definition of the quartiles you have been given? For example a common definition for Q1 and Q3 in this case would put these at 47.5 and 65.5.

    CB
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by ibenot1337 View Post
    [FONT=Trebuchet MS]

    Dataset: 0, 1, 2, 3, 3, 3, 3, 4, 4, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 11, 12

    Median = 5
    Q1 = 3.5
    Q3 = 7
    IQR = 3.5
    Upper Boundary = 29.75
    Lower Boundary = 7

    I don't think that the boundaries are right, as they make 12 results outliers.

    ---

    Please show me how to work these out.
    Quartiles and median are wrong.

    CB
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  4. #4
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    Post Outliers

    Thanks.
    Last edited by ibenot1337; August 31st 2009 at 03:11 AM. Reason: I figured it out.
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