Median value Note : Median Polish works for Affymetrix probe level data as the summarization method in RMA and GCRMA. When selecting Median Polish , specifying one and only one variable in the Variables By Which to Summarize field is needed. 5 th percentile 10 th percentile 25 th percentile 75 th percentile 90 th percentile 95 th percentile 99 th percentile The probability that an observation from a Student's t distribution , with degrees of freedom df and noncentrality parameter nc , is less than or equal to x The computed t-statistic for the values

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