Question

8. [20 Points Machine Translation (6 Points) Given the following unigram and translation probabilities, what is the overall probability scores that a decoder would assign to 'dog bad' beinga translation of the Spanish 'perro malo'? (Hint: You need to find P(perro malo/dog bad) *P(dog bad) for all word allignments) a. Unigram Probabilities for English . dog: 1.7 x 10-5 e cat: 8 x 10-6 bird: 5 x 10-6 bad:1.6 x 10-4 good: 4.9 x 10-4 stupid: 1.1 x 10-5 Translation probabilities Spanish English dog cat bird bad good 03 011 83 02 stu o piaro malo bueno estupido 03 .01 12 5 .09 0455 .04 15 .11 01 02 8 01 03 .02 8705 .02 03 02 12 05 05 05 05 .75 05

Answer 1

Fho the teible nWe See that the Proo babili of dog being than Slated to Peho is 6 ond the Probabilit of bad being tro an Slated to mal o is 8 As suig inde Pedenee op the s events Nokl hom tha unigham PmobabilitieS oh English and auso assuming ndePedenee o the Se evenmts do bad So the hecqvined Phobab)lity is given b