Cumulative Distribution Functions of F-test p-values. Cumulative Distribution Functions (CDFs) of FDR-corrected F-test p-values were calculated based on the gene expression measured for untreated HaCaT cells after 2, 4, and 12 hours. Displayed are the results obtained for the different pre-processing methods used. The vertical red dashed line indicates the commonly chosen p-value cut-off of 0.05. The insert displays the obtained results over the whole range of values from 0 to 1 on both axes.