>Source: http://www.onlamp.com/php/2004/07/22/graphics/boxplot.jpgBox plots appear complicated but once learned are easy to read. The box contains the middle set of data. The top of the box represents the 75th percentile and the lower part of the box represents the 25th percentile. The line in the box represents the median of the data. Data sets outside the box are outliers. The specific box plot is one of test takers with varying anxiety levels. The median score of test takers with low anxiety was about 48. Scores ranged from about 26 to 74 on the test, for this particular anxiety level.
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