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Sample A: Cover Page of Thesis, Project, or Dissertation Proposal

Sample A: Cover Page of Thesis, Project, or Dissertation Proposal

Sample A: Cover Page of Thesis, Project, or Dissertation Proposal

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Figure 2.3: Statistical analysis <strong>of</strong> batches. Graphical depiction <strong>of</strong> array/batch characteristics in a test <strong>of</strong><br />

average probe signal (top) and <strong>of</strong> average number <strong>of</strong> responding probes (bottom) relative to the mean. The<br />

numeral shown indicates to which batch the sample belongs (10 is X), the col<strong>or</strong> indicates disease class<br />

(blue=Adenocarcinoma, red=N<strong>or</strong>mal, purple=Small Cell Carcinoma, green=Pulmonary, and <strong>or</strong>ange =<br />

Squamous), The heavy line in the middle is the mean intensity; lighter dotted lines are 1 and 2 standard<br />

deviation boundaries. The red circle emphasizes the divergent behavi<strong>or</strong> <strong>of</strong> batch 3 in both tests. There are<br />

no batches 2 <strong>or</strong> 9.<br />

The affy package [19] results, when graphed, also indicate that there is a significant difference<br />

in Batch 3 properties; theref<strong>or</strong>e this outcome is not an artifact <strong>of</strong> our probe cleansing<br />

methodology. To run this analysis, mock CEL files were created, using the mean probe intensity<br />

across the arrays in a batch; this process was followed f<strong>or</strong> the <strong>or</strong>iginal array files f<strong>or</strong> all arrays, f<strong>or</strong><br />

the <strong>or</strong>iginal data with outlying samples removed, and f<strong>or</strong> the array files in which deprecated<br />

probes and sample arrays were removed. Boxplots and histogram densities f<strong>or</strong> the outcomes at<br />

48

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