Figure 4.

Effect of statistical test and fold-change on FDR. MPSP was fixed at 4. The fold-change varied from 1 to 5 with 0.25 increments. With the t-test and the Wilcoxon ranksum test performed at a significance level of 5%, five combinations of the two tests were applied as the statistical test criterion: a) without statistical test (neither); b) significant by either the t-test or the Wilcoxon ranksum test (either); c) significant by the Wilcoxon ranksum test alone (ranksum); d) significant by the t-test alone (t-test); e) significant by both the t-test and the Wilcoxon ranksum test (both).