Selective monitoring in economics

Statistical observation has forms, types and methods . Types of statistical observations are divided according to observation time and the completeness of coverage. According to the time of observation they are divided into continuous , periodic and lump sum . According to comprehensiveness of observation they are continuous and non-continuous . Selective survey , which is considered in this course work, refers to non-continuous observation. Continuous monitoring provides a survey of all units of the target population and associated with high labor and material costs . A discontinuous observation is called a study not all units aggregate, but some a certain part on which to judge it is necessary properties of the whole population as a whole .