Odds 襯 觜(proportion) .
覦覲(O))
覦覲(X)
豐
ろ蟲
12
38
50
譟郁軌
5
45
50
ろ蟲
Odds = 12/38
觜 = 12/50
# 襯 觜襦 覲企 レ . 企 蟆曙磯 襯襦 襷企 .
譟郁軌
Odds = 5/45
觜 = 5/50
Odds Ration = (12/38) / (5/45) = 2.842, ろ蟲一 覦覲 Odds螳 譟郁軌 覦覲 Odds覲企 2.842覦 .