Introduction to Computational Linguistics

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ndotioial nrPobailitby hWa ti Ps(|A)B ? Fist,rw at ish (PA)?– P(It “sirai nign) ” .=60 Nwow ha tbauot (P|AB?)– (PIt“i sariing”n “|It was learc 10 imnutse aog) ”=. 004P( A B)| P (A, ) BPB)(

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AB B,Noet: PA(,)B=(PAB| ·) (PB Al)s: PoA,()B= (PB,A)

Indpeneencde Waht i PsA,B( if) andA aBrei ndpeednet?

n (P,BA)P(A=) ·P(B) if AfB, ndiepndene.tP(head,stails =) (hePda) ·sP t(ail) s=.5 ·= .2 5. P(do5ctr,olbu-eyee)s P=doctor) (· (Pble-uyes)e .0= · .1 2= 002 N.ote: PA(|)BP(=A) if AfB in,depneend tAslo:P(B A)=P(|) ifBf ,B Aidepnedennt

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ey TseorehP m (B | A )P (A |B )P()BP ()A wSp tae hodrreof depe dencen oSetimmse esier toa esimatte oen knid o fdpeenendec thant he toehr

Whtad oe thissh avet o do iwt the Noihsy Channle odeM?

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)(H)PP(|O)HBes HP tO |( ) H P H ) P (O( ilkeilhodo) pirroBes Ht a=rgam PxH(O|) =argaxm H

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aht i the smsto ileky lwrd giveo nn[]i? ompCue prior t(P)worW dfeqr(w P()w)newneat nee dkeen26523381 17 641.001

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