Figure 6 of
Jablonski, Mol Vis 2004;
**10**:577-587.

Figure 6. p Value distributions and q value cut-off values

**A** illustrates a frequency histogram of the p values obtained
in the array analysis. The pale grey horizontal line indicates the
distribution of p values under the assumption that all tests are truly
non-significant. The darker horizontal line indicates the uniform
distribution of p values expected in this data set, with 71.7% of the
tests truly non-significant. The frequency of tests above this line is
the frequency of truly significant results estimated in each p value bin
of the histogram. **B** illustrates the number of rejected tests at
a given q value. Note that for a q value of 0.2, 1150 genes are declared
significant, and 20% or 230 of these rejected tests are false
discoveries.

Jablonski, Mol Vis 2004;

©2004 Molecular Vision <http://www.molvis.org/molvis/>

ISSN 1090-0535