The process of selecting a part of the cumulative in order to acquire statistical information from a given data is known as sampling. Sampling is done in order to acquire maximum amount of information about a population.
What is a population and sample?
The cumulative or the aggregate obtained from such a data is known as population whereas, the selected part for sampling is known as a sample. The population obtained from a data is defined as finite or infinite, based upon its size or to be precise, on the number of members.
A sample is analysed in order to acquire knowledge about the probability distribution of a variable of a population.
Despite applying great efforts while sampling, there might be some inconsistency where the characteristics of a population cannot be interpreted correctly. This is known as sampling error.