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What are the hidden variables if you want to find PCA).

What are the hidden variables if you want to find PCA).

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider the following example alarm network, and answer the questions: P(B) E P(E) B Burglary Earthqk +e 0.002 +b 0.001 -e 0.998 -b 0.999 Alarm BEA P(A|B,E) +b +e +a 0.95 John Mary calls calls +b +e -a 0.05 +b -e +a 0.94 A P(UJA) A M P(M|A) +b -e -a 0.06 ta +j 0.9 +a +m 0.7 -b +e +a 0.29 0.1 +a -m 0.3 -b +e -a 0.71 +j 0.05 0.01 -b -e +a 0.001 -a -a +m -a 0.95 0.99 -b -e -a 0.999 What are the hidden variables if you want to find P(A). ++
Transcribed Image Text:Consider the following example alarm network, and answer the questions: P(B) E P(E) B Burglary Earthqk +e 0.002 +b 0.001 -e 0.998 -b 0.999 Alarm BEA P(A|B,E) +b +e +a 0.95 John Mary calls calls +b +e -a 0.05 +b -e +a 0.94 A P(UJA) A M P(M|A) +b -e -a 0.06 ta +j 0.9 +a +m 0.7 -b +e +a 0.29 0.1 +a -m 0.3 -b +e -a 0.71 +j 0.05 0.01 -b -e +a 0.001 -a -a +m -a 0.95 0.99 -b -e -a 0.999 What are the hidden variables if you want to find P(A). ++
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