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enough to bring out the traits of the population.

◆ Representative: The sample size must be truly representative
of the population.
◆ Essentials of
◆ Reliable: The sample size must be reliable so that proper optimum sample
analysis is possible. size

◆ Flexibility: The sample size must be flexible so that slight
changes could be accommodated without compromising on
the results.

2.2.4 Calculation of Sample Size

The mathematical estimation of the number of units is known as ◆ Mathematical
sample size determination. There are different formulae which are estimation
practically used by researchers in finding out the desired sample
size. The popular ones are as follows:

i. Krejcie and Morgan’s Formula
It is one of the popular methods adopted by researchers. Krejcie
and Morgan’s formula takes into account three key factors; the size
of the population being studied, the desired level of confidence,
and the acceptable margin of error.
Krejice and Morgan’s sample size determination table can also
be used. The table is shown in figure 2.2.1.

SGOU - SLM - MCom Research Methodology 71