chapter3 - 9/2/2011 Bivariate Data Introduction to...

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9/2/2011 1 Introduction to Probability and Statistics Thirteenth Edition Chapter 3 Describing Bivariate Data Bivariate Data • When two variables are measured on a single experimental unit, the resulting data are called bivariate data . • You can describe each variable individually, and you can also explore the relationship between the two variables. • Bivariate data can be described with Graphs Numerical Measures Graphs for Qualitative Variables • When at least one of the variables is qualitative, you can use comparative pie charts or bar charts. Variable #1 = Variable #2 = Do you think that men and women are treated equally in the workplace? Opinion Gender Women Men Comparative Bar Charts • Stacked Bar Chart Percent Opinion Gender No Opinion Disagree Agree Women Men Women Men Women Men 70 60 50 40 30 20 10 0 • Side-by-Side Bar Chart Describe the relationship between opinion and gender: More women than men feel that they are not treated equally in the workplace. . Opinion No Opinion Disagree Agree 120 100 80 60 40 20 0 Gender Men Women
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9/2/2011 2 Two Quantitative Variables When both of the variables are quantitative, call one variable x and the other y . A single measurement is a pair of
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This note was uploaded on 09/19/2011 for the course MTH 1250C taught by Professor Any during the Fall '08 term at St. Johns Duplicate.

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chapter3 - 9/2/2011 Bivariate Data Introduction to...

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