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. 2007 Oct 30;7:40. doi: 10.1186/1472-6920-7-40

Figure 1.

Figure 1

Intern controls and PUT group pre and post-training test scores. The central line is the median, the box represents the interquartile range (the 25th to 75th percentile), the whiskers extend to the largest and smallest values within 1.5 box lengths, and circles and asterisks represent outliers within or greater than 3 box lengths from the box edge, respectively.