The process of selecting a subset of population for a survey is called as

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This question was previously asked in

RRB Staff Nurse Previous Year Paper [Held on 20 July 2019 (Shift II)]

Answer 1

Concept:-

Sampling: the process of selecting a small number of elements from a larger defined target group of elements
The information gathered from the small group will allow judgments to be made about the larger groups

Types of sampling:

Simple random sampling	Sample selected at random from a population in which every member of the population has an equal chance of being selected.
Systematic random sampling	Selecting every nth case from a population
Stratified random sampling	Randomly selecting participants for a sample from predetermined strata in a population.
Cluster sampling	Selecting a sample based on pre-organized groups
Convenience sampling	Selecting a sample from whatever subjects are available

Additional Information

Triangulation: Triangulation is an approach to research that uses a combination of more than one research strategy in a single investigation.
Random Allocation: the participants in the study population are randomly allocated into two groups using random number tables, or computers to avoid selection and confounding biases.