The list of all the sampling units with a proper identification (which represents the population to be covered is called sampling frame). The frame may consist of either a list of units or a map of area (in case sample of area is being taken), such that every element in the population belongs to one and only one unit.

A parameter is a number describing a whole population (e.g., population mean), while a statistic is a number describing a sample (e.g., sample mean). The goal of quantitative research is to understand characteristics of populations by finding parameters. … Instead, data is collected from samples.

In the context of market research, a sampling unit is an individual person. … Sampling units are taken from an entire population, such as a country, customer database or region, and put into a smaller group to form a research sample. This group of units is then used to research, analyse and draw conclusions on

Sampling frame (synonyms: “sample frame”, “survey frame”) is the actual set of units from which a sample has been drawn: in the case of a simple random sample, all units from the sampling frame have an equal chance to be drawn and to occur in the sample.