Statistics Mathematics and statistics Statistics is the study of collecting, describing, arranging and analysing numerical data. The study of probability theory and actuarial science is included. Programmes and qualifications with the following main content are classified here: - Actuarial science - Probability theory - Statistics, applied - Survey design - Survey sampling Study of mathematical (theoretical) statistics is included here. Demography/population studies is excluded from this detailed field and included in detailed field 0314 'Sociology and cultural studies'.