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Sagot :
The research study that divides the population of interest into groups according to a common attribute after which a random sample within each group is chosen called is: stratified sampling.
What is stratified sampling
Stratified sampling can be defined a research method in which people are separated into different group based on the age, gender, race among others before conducting a random sample.
This type of research method are often use by researcher when they want to analyze and evaluate the data or information collected from the subset of a group before reaching a conclusion.
Therefore the research study that divides the population of interest into groups according to a common attribute after which a random sample within each group is chosen called is: stratified sampling.
Lean more about stratified sampling here:https://brainly.com/question/20544692
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