stratified simple random sampling

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stratified simple random sampling

statistics

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sample survey methods

In statistics: Sample survey methods
Stratified simple random sampling is a variation of simple random sampling in which the population is partitioned into relatively homogeneous groups called strata and a simple random sample is selected from each stratum. The results from the strata are then aggregated to make inferences about…
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statistical tools

In probability and statistics: Samples and experiments
His method of stratified sampling incorporated a concern for representativeness across the most important variables, but it also required that the individuals sampled should be chosen randomly. This was designed to avoid selection biases but also to create populations to which probability theory could be applied to calculate…
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