Having or having to do with two variables For example, bivariate data are data where we have two measurements of each "individual " These measurements might be the heights and weights of a group of people (an "individual" is a person), the heights of fathers and sons (an "individual" is a father-son pair), the pressure and temperature of a fixed volume of gas (an "individual" is the volume of gas under a certain set of experimental conditions), etc Scatterplots, the correlation coefficient, and regression make sense for bivariate data but not univariate data C f univariate