log likelihood
...) ( ) ( ) ( ) ( ) ( ) , ( χ 2 2 d c d b c a b a c b d a n tt st + × + × + × + × − × × = (4) 对数可能性(Log Likelihood)分值 ) ) ( ) ( log ) ( ) ( log ) ( ) ( log ) ( ) ( log ( 2 ) , ( d b d c n d d c a d c n c c d b b a n b b c a b a n a a...