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Unformatted text preview: Analysis of twoway tables IPS chapter 2.5 2006 W.H. Freeman and Company Objectives (IPS chapter 2.5) Data analysis for twoway tables Twoway tables Joint distributions Marginal Distributions Conditional distributions Simpsons paradox What is a TwoWay Table? A twoway table shows the relationship between two categorical variables. Twoway table for frequent binge drinking and gender: Row variable: Binge Drinking Column Variable: Gender Cell: Any combination of specific categories of the row and column variables. Gender Binge Drinker? Men Women Total Yes 1,630 1,684 3,314 No 5,550 8,232 13,782 Total 7,180 9,916 17,096 Joint distribution: Divide each cell by total sample size to get four proportions. Collection of these proportions is the joint distribution of the two categorical variables. Gender Binge Drinker? Men Women Yes 0.095 0.099 No 0.325 (=5550/17096) 0.482 Gender Binge Drinker? Men Women Total Yes 1,630 1,684 3,314 No 5,550 8,232 13,782 Total 7,180 9,916 17,096...
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This note was uploaded on 03/03/2009 for the course PAM 2100 taught by Professor Abdus,s. during the Fall '08 term at Cornell University (Engineering School).
 Fall '08
 ABDUS,S.

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