Figure 1.

A histogram of the distribution of<a onClick="popup('http://www.biomedcentral.com/1472-6947/12/86/mathml/M27','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6947/12/86/mathml/M27">View MathML</a>from a resampling without replacement exercise on a real world data set of the ward compliance with hospital trust policy. This exemplifies the possible variation in the <a onClick="popup('http://www.biomedcentral.com/1472-6947/12/86/mathml/M28','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1472-6947/12/86/mathml/M28">View MathML</a> statistic that can arise when data are re-ordered, highlighting the extent of the problem when the data have no underlying order, such as time.

Poots and Woodcock BMC Medical Informatics and Decision Making 2012 12:86   doi:10.1186/1472-6947-12-86
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