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Suppose I want to survey a group of students about their thoughts on online classes. I...

Suppose I want to survey a group of students about their thoughts on online classes. I decide to look at all 5 of my classes, online or in person. I take a random sample of 15 students from each course and survey them. What type of sampling method am I using?

math   Statistics-And-Probability   
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Answer #1

Stratified sampling

Stratified sampling is the process in which the population is divided into different mutually exclusive groups (strata) and sample is randomly drawn from each strata. Here, the 5 classes are the 5 strata and samples are randomly drawn from the 5 classes. So, this sampling method is stratified sampling.

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