http://www.youtube.com/watch?v=Osw9-DRkGYE 2:16 And having examined those judgments, this is where we learn that whites are favored by a factor of four. これらの証拠から何がわかったかと言えば白人受刑者は黒人服役囚の四倍の確率で恩赦されると言うことだ。
参考リンク
http://bridge-english.blogspot.jp/2009/05/common-denominator.html common denominator
練習問題解答
b-0375 by as much as a factor of 100
b-1138 by a factor of three
b-3771 by a factor of