Laboratory of Microbial Genomics and Big Data (강원대학교 미생물유전체빅데이터 연구실)

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# Chi-Square Test ###########################################################
# 600 out of 2,500 genes were involved in metabolism.
TotalGenes   = c(2500, 600)
# 135 out of 250 down-regulated genes were involved in metabolism.
ChangedGenes = c(250, 135)
table = cbind (TotalGenes, ChangedGenes)
table
chisq.test(table)
fisher.test(table)
# Odds Ratio = (135/250)/(600/2500) = 2.25 > 1.0 (expected) --> Strange!!