Figure 3From: Screening for foot problems in children: is this practice justifiable? The statistical definition of ‘normal’ is the area under the curve, which is two standard deviations either side of the population mean. This represents 95% of any normally distributed sample, such that only 2.5% are above and below these values. Reproduced from: http://michaelsrickert.wordpress.com/2012/02/06/what-is-your-emr-bell-curve/ Back to article page