Members of the population are divided into 2 or more subsets, called strata, that share similar characteristics such as age, gender, ethnicity, or even political preference. A sample is then randomly selected from each of the strata.Ex: chosen at random, 500 rural and 500 urban persons age 65 or older are asked about their health and experience with prescription drugs...___ sampling was used since the population was divided into two strata (urban & rural) and samples were randomly taken from each strata

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1. Members of the population are divided into 2 or more subsets, called strata, that share similar characteristics such as age, gender, ethnicity, or even political preference. A sample is then randomly selected from each of the strata.
Ex: chosen at random, 500 rural and 500 urban persons age 65 or older are asked about their health and experience with prescription drugs...___ sampling was used since the population was divided into two strata (urban & rural) and samples were randomly taken from each strata