1 In contrast to univariate analysis, subgroup comparisons constitute a kind of bivariate analysis because two variables are involved. In these situations, we are usually interested in relationships among the variables. Univariate analysis and subgroup comparisons focus on describing the people under study, whereas bivariate analysis focuses more on the variables themselves. You have made it! With all of your statistical know-how, the federal government has hired you to begin the largest-ever government research project on gun crime and gun control in the nation's history. You direct supervisor has given you freedom to begin with one of two groups of subjects: gun owners and gun victims. Before you decide this case, let's review some key concepts. The basic PRE model is modified slightly to account for different levels of measurement - nominal, ordinal, and