At a small college there are 120 freshmen,90 sophomores,110 juniors,and 80 seniors.A school administrator selects a random sample of 12 of the freshmen,a random sample of 9 of the sophomores,a random sample of 11 of the juniors,and a random sample of 8 of the seniors.She then interviews all the students selected.Identify the type of sampling used in this example.

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Quizplus · Accepted Answer

This example uses stratified sampling because the population is divided into different strata (freshmen, sophomores, juniors, and seniors) and a random sample is taken from each stratum. This allows for a more representative sample of the entire population.

At a Small College There Are 120 Freshmen,90 Sophomores,110 Juniors,and