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The interquartile range (IQR) is the distance between the 75th percentile and the 25th percentile. The IQR is essentially the range of the middle 50% of the data. Because it uses the middle 50%, the IQR is not affected by outliers or extreme values.
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www.childrens-mercy.org/stats/definitions/iqr.htm
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Interquartile Range; IQR ... The difference between the first quartile and third quartile of a set of data. This is one way to describe the spread of a set of data. ... this page updated 29-jul-08; Mathwords: Terms and Formulas from Algebra I to Calculus written, illustrated, and webmastered by Bruce Simmons...
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www.mathwords.com/i/interquartile_range.htm
www.mathwords.com/i/interquartile_range.htm
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The interquartile range is a measure of variability, spread or dispersion. It is the difference between the 75th percentile (often called Q3) and the 25th percentile (Q1). The formula for interquartile range is therefore: Q3-Q1. It is sometimes called the H-spread.
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davidmlane.com/hyperstat/A78092.html
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The semi-interquartile range is a measure of spread or dispersion. It is computed as one half the difference between the 75th percentile [often called (Q3)] and the 25th percentile (Q1). The formula for semi-interquartile range is therefore: (Q3-Q1)/2. Since half the scores in a distribution lie between Q3 and Q1,
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davidmlane.com/hyperstat/A48607.html
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Half of this range (25 percent or the distribution) is called semi-interquartile range ... interquartile range in the news ... Search volume for interquartile range...
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www.businessdictionary.com/definition/interquartile-ran...
www.businessdictionary.com/definition/interquartile-range.html
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Like the standard deviation, the interquartile range (IQR) is a descriptive statistic used to summarize the extent of the spread of your data. The IQR is the distance between the 1st quartile (25th percentile) and 3rd quartile (75th percent...
http://wiki.answers.com/Q/What_is_the_interquartile_ran...
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Sci-Tech Dictionary: interquartile range ... The interquartile range is the difference between the values of the upper and lower quartiles. The closer the clustering of values around the median, the smaller the interquartile range. The value of the interquartile range is important when two sets of similar data are compared.
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www.answers.com/topic/interquartile-range
www.answers.com/topic/interquartile-range
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www.lakeland.cc.oh.us/academic/sh/math/ddavis/telecours...
www.lakeland.cc.oh.us/academic/sh/math/ddavis/telecourse/ppfiles/BMAN03ef/sld065.htm
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