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Table 3 Variance in a one-colour system.

From: Construction and validation of the APOCHIP, a spotted oligo-microarray for the study of beta-cell apoptosis

concentration μg/20 μL One-color variance One-color variance, block s2
1/3 0.093 0.056 0.027
1 0.057 0.053 0.029
2 0.101 0.044 0.040
3 0.048 0.030 0.027
4 0.046 0.033 0.031
  1. In the first column a global median centering is used, and in the second a median centering for each of the 8 blocks is used. The last column gives 2σs2 for comparison.