11.3 - Contingency Tables - CONTINGENCY TABLES A Bourhim...

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CONTINGENCY TABLESA. BourhimSyracuse UniversityFall 2015A. Bourhim (Syracuse University)CONTINGENCY TABLESFall 20151 / 9
Other details and the solution ofthe examples will be presented inthe class. Your attendance istherefore required.A. Bourhim (Syracuse University)CONTINGENCY TABLESFall 20152 / 9
IntroductionContingency tables(with at least two rows and at least two columns) displaydata so we can see if there is a relationship between the row and columnvariables.independent variable: displayed across the top (columns).dependent variable: down the sides (rows).In this section, we present a method for testing the null hypothesis that in acontingency table, the row and column variables are independent. Such testis called atest of Independence.ExampleHere is a contingency table about the smoking habits of students and theirparents’ smoking.Both parentsOne parentNeither parentsmokesmokessmokesStudent Smokes201115Student does not smoke312935A. Bourhim (Syracuse University)CONTINGENCY TABLESFall 20153 / 9

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