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The course notes explain that:
Stratified:
If the population was 60% women, 40% men, then 60% of the sample should be women and 40% men.Quota:
Population is 60% women and 40% men. We want to question a sample of 200. Decide on a quota of 120 women (60%) and 80 men(40%), and stop people as they appear until we have the required number.The only difference I see is the way in which candidates are chosen (one by one until the quota is satisfied), however, in stratified sampling, it makes no reference to how the 60% and respective 40% are selected.
I’m a little confused,any help would be greatly appreciated.
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