How Wald test calculates p-values in DESeq2?
How Wald test calculates p-values in DESeq2?
After getting (LFC) Log2foldChange how p-values are calculated for each gene in samples by Wald test? by results function we get p-values how they are calculated ?
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The answer will be the z-test for two samples:
z = ( ¯x1 − ¯x2) -D / √σ1^2/n1 + σ2^2/n2)
Where ¯x1 is the mean from the collected cancer samples and ¯x2 is the mean of the collected normal samples.
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Have you checked wikipedia? https://en.wikipedia.org/wiki/Wald_test
Everything is described in the original article : https://genomebiology.biomedcentral.com/articles/10.1186/s13059-014-0550-8