Classification variance. Variance and 95% confidence intervals of the AUC from external validation between the five datasets (n = 2 × = 20 (train, test) pairs) for different numbers of features. The confidence intervals are , where is the α = 0.05 quantile for a chi-squared distribution with n - 1 degrees of freedom, s2 is the sample variance and.
Abraham et al. BMC Bioinformatics 2010 11:277 doi:10.1186/1471-2105-11-277