Chapter 8 | Sampling and Sampling Distributions265
graduates, and 200 postgraduates will lead to disproportionate stratied random sampling. So, in
cases, where the sample taken from each stratum is disproportionate to the actual percentage of the
stratum within the whole population, disproportionate stratied random sampling occurs. Figure 8.5
exhibits the stratied random sampling based on educational levels.
8.6.5Cluster (or Area) Sampling
In cluster sampling, we divide the population into non-overlapping areas or clusters. It might seem as
there is no difference between stratied sampling and cluster sampling. This is not ...
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