Statistics
Roles: sample, population, distribution, aggregation, variable, correlation, confound
The discipline of collecting, analyzing, and interpreting quantitative data. As a source domain, statistics foregrounds the gap between observed data and underlying reality, the dangers of aggregation, and the formal machinery required to distinguish signal from noise. Structurally productive because it encodes the ways that summary measures can mislead, that samples can misrepresent populations, and that correlation structures can invert under partitioning or combination.