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if 50 sample students have to selected from the whole school
comprising of 500 students, we write the names or roll numbers
of all students in each class on chits and put them in a box. Then
we drew 50 chits from it constitutes samples. This method works
well when we have a proper sample frame like a nominal roll of
students or a payroll of employees.
If we draw chits and put them back for another chance, it’s
called unrestricted random sampling. If we draw chits and don’t ◆ Unrestricted and
allow them to participate again, it’s restricted random sampling. restricted random
b. Random numbers table method sampling
Kendall and Smith (1939) Fisher and Yates (1963) and Tippet
(1927) developed a table of random numbers. We can select
samples by reading numbers within a given range of the frame.
A random number table is a series of digits (0 to 9) arranged
randomly in rows and columns, as demonstrated in the small
sample shown below.

Fig 2.1.2 Random Numbers Table

SGOU - SLM - MCom Research Methodology 57