1. The problem asks: Which of the following is an example of bivariate data? 2. Bivariate data involves two variables measured together to see if there is a relationship between them. 3. Let's analyze the options: - a) Height of students: This is one variable (univariate). - b) Favorite color of students: One variable (univariate). - c) Number of siblings and favorite subject of students: Two variables, so this is bivariate. - d) Age of students: One variable (univariate). 4. Therefore, the correct answer is c) Number of siblings and favorite subject of students. Final answer: c