From Youtube, find one short video (not longer than 5 minutes) and list the steps involved in one probability sampling methods (simple random sampling, stratified sampling, cluster sampling).
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Neville and Hunt (2004) provided the following insights in Stratified Sampling.
In a stratified sample the sampling frame is divided into non-overlapping groups or strata, e.g. geographical areas, age-groups, genders. A sample is taken from each stratum, and when this sample is a simple random sample it is referred to as stratified random sampling.
Choice of Sample Size for each Stratum
In general the size of the sample in each stratum is taken in proportion to the size of ...
The solutions describes a short video on sampling method from Youtube.