ex7_slides - CS221 Discussion Section 1 Bayes Ball A...

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CS221 Discussion Section November 15, 2007 November 15, 2007 1
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Bayes Ball: A different view Variable type From Parent From Child Unobserved Passes through to children Passes through and bounces back to chil- dren Observed Bounces back to parents Blocks balls Tuberculosis Abnormality to Asia Bronchitis Lung Cancer Smoking Dyspnea X-ray in Chest Visit November 15, 2007 2
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Variable elimination P ( D ) = summationdisplay A,B,L,T,S,X,V P ( V ) P ( T | V ) P ( S ) P ( L | S ) P ( B | S ) P ( A | L,T ) P ( X | A ) P ( D | A,B )
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