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12 June, 08:35

Before polling the students in Scion School of Business, a researcher divides all the current students into groups based on their class standing, such as freshman, sophomores, and so on. Then, she randomly draws a sample of 50 students from each of these groups to create a representative sample of the entire student body in the school. Which of the following sampling methods is the researcher practicing? 1. stratified random sampling 2. simple random sampling 3. cluster sampling 4. systematic random sampling 5. snowball sampling

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  1. 12 June, 11:31
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    1. Stratified Random Sampling

    Step-by-step explanation:

    Sampling is a technique of drawing small number of representative units from population.

    Stratified Random Sampling is when population is divided into : heterogenous (different) groups, homogeneous (identical) within themselves - known as Strata.

    Process of drawing Sample from each such strata group is called Stratified Random Sampling. This sampling makes sample better representative of various groups in population. Eg : Dividing population in strata based on gender, religion etc & then drawing sample from each strata.

    Researcher dividing students into - freshman, sophomores & other groups; then drawing sample from each group is an example of Stratified Sampling. It creates representative sample of each student body in school.
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