Research Methodology by Kumar Dr Ranjit

Author:Kumar, Dr Ranjit [Kumar, Dr Ranjit]
Language: eng
Format: epub
Published: 0101-01-01T00:00:00+00:00

As they represent the total sampling population, the inferences drawn from such samples can be generalised to the total sampling population.

Some statistical tests based upon the theory of probability can be applied only to data collected from random samples. Some of these tests are important for establishing conclusive correlations.

Methods of drawing a random sample

Of the methods that you can adopt to select a random sample the three most common are:

The fishbowl draw – if your total population is small, an easy procedure is to number each element using separate slips of paper for each element, put all the slips into a box and then pick them out one by one without looking, until the number of slips selected equals the sample size you decided upon. This method is used in some lotteries.

Computer program – there are a number of programs that can help you to select a random sample.

A table of randomly generated numbers – most books on research methodology and statistics include a table of randomly generated numbers in their appendices (see, e.g., Table 12.3). You can select your sample using these tables according to the procedure described in Figure 12.3.

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