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Unformatted text preview: Logistic Regression Data Mining Prof. Dawn Woodard School of ORIE Cornell University 1 Outline 1 Announcements 2 Logistic Regression 2 Announcements Questions? 4 Logistic Regression In logistic regression, we model Pr ( Y = 1  X = x ) as a function of + 1 x . Compare this to naive Bayes 6 Logistic Regression In logistic regression, we model Pr ( Y = 1  X = x ) directly In naive Bayes, we model Pr ( Y = 1 ) , and the conditional distribution of X given Y To predict, we use Bayes theorem to calculate Pr ( Y = 1  X = x ) 7 Challenger Disaster 1/28/86: Space shuttle Challenger explodes after launch kills the 7 crew members Attributed to the failure of Orings on the shuttle Temperature was 31 degrees Previous low temp. for launch: 53 deg. 8 Challenger Disaster Locations of field joints: 9 Challenger Disaster 6 field joints; each has 2 Orings Orings sensitive to temperature Let Y = 1 indicate failure of field joint Y = 0: field joint OK 10 Challenger Disaster 11 Challenger Disaster...
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This note was uploaded on 12/23/2009 for the course ORIE 4740 at Cornell University (Engineering School).
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