Figure 3.

Comparison of the observed frequency distribution of consecutive samples to the inverse normal cumulative distribution. Quantile-quantile plots show on y-axis the difference of expression of two microarrays and on x-axis value of the corresponding inverse normal cumulative distribution. Microarray data are derived from HuGeneFL, using cell line IMR90 [10]. Probe sets of the microarrays 1 and 3 are ordered according to the mean expression and statistical samples of 12 probe sets are taken in the range of ranks from 250 to 4800. Panels show the samples with the Kolmogorov-Smirnov maximum distance equal or close to the mean value in the specified average expression rage. Inserts provide the average mean expression (range avg.), mean of the differences (s. avg.) and standard deviation (s. SD). A: expression range from 400 to 620, average D in the range is 0.142, sample D is 0.142; B: expression range from 10 to 20, average D in the range is 0.204, sample D is 0.204.