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Cross-tabulations and Banners. Cross-tabulation Way to organize data by groups or categories, thus facilitating comparisons; joint frequency distribution.

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Presentation on theme: "Cross-tabulations and Banners. Cross-tabulation Way to organize data by groups or categories, thus facilitating comparisons; joint frequency distribution."— Presentation transcript:

1 Cross-tabulations and Banners

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3 Cross-tabulation Way to organize data by groups or categories, thus facilitating comparisons; joint frequency distribution of observations on two or more sets of variables Contingency table: Result of cross- tabulating two variables, such as survey questions Relative to univariate analyses, bivariate analyses can provide more insights

4 Example #1

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9 Example #2

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12 Looking for Differences Between Groups

13 Type of Measurement Differences between two independent groups Nominal Chi-square test When Chi-square Test Appropriate

14 MenWomenTotal Aware 50 10 60 Unaware 15 25 40 65 35 100 Awareness of Tire Manufacturer’s Brand Question: Do men differ from women in their awareness? Example #3

15 Chi-Square Test x² = chi-square statistics O i = observed frequency in the i th cell E i = expected frequency on the i th cell

16 R i = total observed frequency in the i th row C j = total observed frequency in the j th column n = sample size Chi-Square Test

17 d.f.=(R-1)(C-1) Degrees of Freedom

18 Chi-Square Test

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27 Elaboration and Refinement Moderator variable –Third variable that alters or has a contingent effect on the relationship between an independent variable and a dependent variable –Spurious relationship An apparent relationship between two variables that is not authentic

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31 Tworatingscales 4 quadrants two-dimensionaltable Importance-PerformanceAnalysis) Quadrant Analysis

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