STATISTICAL TESTS FOR CATEGORICAL DATA
• Understand the concepts associated with the independence of two variables
• Understand statistical independence of two variables
• Understand and interpret the chi-square statistic
As indicated elsewhere in this book, a major part of statistical analysis is the assessment of the independence of two or more variables. The t test assesses the independence of two variables, one measured on a numerical scale and the other measured on a categorical scale that takes only two values. Analysis of variance (ANOVA) assesses the independence of two or more variables. With ANOVA, one variable is measured on a numerical scale and the others are measured on categorical scales that may take ...