Sample:
It is a subset of the population. It comprises only some elements of the population.
Example: If out of the 350 mechanical engineers employed
in an organization, 30 are surveyed regarding their intention to leave the
organization in the next six months, these 30 members would constitute the
sample.
Sampling unit:
A sampling unit is a single member of the sample.
Example: If a sample of 50 students is taken from a
population of 200 MBA students in a business school, then each of the 50
students is a sampling unit.
Sampling:
It is a process of selecting an adequate number of elements from the population
so that the study of the sample will not only help in understanding the characteristics
of the population but also enables us to generalize the results.
Census (or complete enumeration): An examination of each and every element of the
population is called census or complete enumeration. Census is an alternative to
sampling. We will discuss the inherent advantages of sampling over a complete enumeration
later.
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