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A pair of variables from a data set with at least two variables.
Example
Consider a data set consisting of the heights, ages, genders and eye colours of a class of Year 9 students. The two variables from the data set could be:
both numerical (height and age),
both category (gender and eye colour), or
one numerical and one category (height and gender, respectively).
Note: Part of a Level Eight achievement objective states “including linear regression for bivariate data”. This use of bivariate data implies that both variables are numerical (i.e., quantitative variables).
Curriculum achievement objectives references
Statistical investigation: Levels (3), (4), (5), (6), (7), 8
