African American male tumor vs. normal: case-paired t-test analysis. A comparison of micro array data from tumor versus normal for the prostate sample from African American (AA) Males was analyzed using R-bioconductor. This figure shows (1) a cluster gram of differentially expressed genes in the three prostate tumor sample vs. the three matching non-tumor prostate tissue in African American males; (2) an MA plot is also shown in the lower left of this figure and (3) a Volcano Plot depicting additional information about these differentially expressed genes is shown in the lower right of this figure. The cluster gram shows a high degree of variation from among AA tumor samples and among AA normal samples. The Volcano and MA plots both showed an absence of high p-values and an absence of high fold change.