The variance of proportion versus the mean tag counts in base-10 log scale. The variances of proportion were computed from replicates of the same biological samples. (a) Caltech dataset; (b) Chiang dataset;(c) Bullard dataset. Each point represents a gene averaged over replicates (see Table 2 for the number of replicates for each dataset). The red line has a slope of -1. The black line is fit to the data for a mean (x-axis) larger than 2 (count greater than 100).
Cai et al. BMC Bioinformatics 2012 13(Suppl 13):S5 doi:10.1186/1471-2105-13-S13-S5