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In (Simple) random sampling, all of the units in the sample have the same chance of being included in the sample. Units are selected randomly from a population by some random method that gives equal probability to each element.
In stratified random sampling, the entire population is divided into heterogeneous sub-popuation known as strata (sub-population with unequal variances) and a random sample is chosen from each of these stratum.
The reason when to use which depends on the situation and need of the experimenter.
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What is stratified random sampling?
cheese
What is the difference between simple random sampling and random sampling?
Simple!
What are the various kind of sampling?
They include: Simple random sampling, Systematic sampling, Stratified sampling, Quota sampling, and Cluster sampling.
Breifly explain three different examples of sampling?
simple random, stratified sampling, cluster sampling
Similarities between stratified random samplingcluster random sampling and quota random sampling?
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