An abstract representational system studying numbers, shapes, structures, quantitative change and relationships between them.
A person's ability to count, calculate, and use different systems of mathematics at differing levels.
A discipline, principally within applied mathematics, concerned with the systematic study of the collection, presentation, analysis, and interpretation of data.
A systematic collection of data on measurements or observations, often related to demographic information such as population counts, incomes, population counts at different ages, etc.