Bivariate
Bivariate data is data for which there are two variables for each observation. As an example, the following bivariate data show the ages of husbands and wives of 10 married couples.
Husband | 36 | 72 | 37 | 36 | 51 | 50 | 47 | 50 | 37 | 41 |
Wife | 35 | 67 | 33 | 35 | 50 | 46 | 47 | 42 | 36 | 41 |