Figure 2From: Identifying differential expression in multiple SAGE libraries: an overdispersed log-linear model approachComparisons based on simulated data from the negative binomial distribution. The ROC curves of the four tests are based on datasets generated from the negative binomial distribution with various magnitudes of overdispersion (φ). The data are simulated by the same strategy as used in Figure 1, except that p B = 4p A . Note that the overdispersion parameter here is not directly comparable with that in Figure 1 (the parameter φ for the negative binomial is not directly related to that for the beta-binomial). For figures generated under other conditions, see Additional file 2.Back to article page