Fig. 4

The relationship of p-values to number of genes in the test statistic L k . The p-value in a hypothesis test with test statistic L k , a weighted sum of t-statistics, plotted against the number of genes k used in the calculation of L k . The two strata that are compared in the t-statistics that are used for computing L k are «Screening or interval with spread» and «Screening or interval without spread»