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Math Help - range, inter-quartile range

  1. #1
    mlbg
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    range, inter-quartile range

    How do I find the range of a set of data?
    How do I identify the inter-quartile range?
    What is the difference between the range and the interquartile range?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by mlbg
    How do I find the range of a set of data?
    Range - the length of the smallest interval containing the data, so
    its the difference between the largest and smallest value in the sample.

    How do I identify the inter-quartile range?
    Quartile - one of the three values that divides the data into four intervals
    each containing 25% of the data points. The first quartile cuts of 25%
    of the points, the second quartile cuts of 50% of the points, also known as the median, third quartile cuts of 75% of the points.

    What is the difference between the range and the interquartile range?
    Interquartile range is the difference between the third and first quartiles.

    RonL
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