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simplypsychology.org
Stratified Random Sampling: Definition, Method & Examples
Stratified sampling is a method of sampling that involves dividing a population into homogeneous subgroups or 'strata', and then randomly selecting individuals from each group for study.
Jul 31, 2023
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#Laboratory sample tube Blood
Mature Asian male scientist working in medical laboratory. Professional researcher examining test tube with blood sample for analysis. Healthcare, scientific research and pharmaceutical development
Adobe
2 weeks ago
Blood sample tube with laboratory requisition form for allergy...
istockphoto.com
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