Statistical physics is a branch of
physics that uses methods of
probability theory and
statistics, and particularly the
mathematical tools for dealing with large populations and approximations, in solving physical problems. It can describe a wide variety of fields with an inherently
stochastic nature. Its applications include many problems in the fields of physics,
biology,
chemistry,
neurology, and even some social sciences, such as
sociology. Its main purpose is to clarify the properties of matter in aggregate, in terms of physical laws governing atomic motion.