Box plot: Difference between revisions

Revision as of 05:57, 24 August 2006

Revision as of 13:44, 8 September 2006

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* the value 0.5 is an "extreme" outlier, more than 3*(IQR) below Q1

* the smallest value that is ''not'' an outlier is 5

* the data isare [[skewness|skewed]] to the left (''negatively skewed'')

The horizontal lines (the "whiskers") extend to at most 1.5 times the box width (the [[interquartile range]]) from either or both ends of the box. They must end at an observed value, thus connecting all the values outside the box that are not more than 1.5 times the box width away from the box. Three times the box width marks the boundary between "mild" and "extreme" outliers.