Activity 5.2.2 In each of the following examples, identify the Sampling Methods being Used 1. A sample of 2.000 was sought to estimate the average achievement in science of fifth graders in a city's public schools. The average fifth grade enrolment in the city's elementary schools is 100 students. Thus, 20 schools were randomly selected and within each of those schools all fifth graders were tested. 2. A researcher is interested in maximum-secunty inmates. She group inmales by the type of crime committed, determine the percentage of the lotal in each crime category, and uses that percentage to determine the number of inmates randomly selected from each group 3. A sociologist conducts an opinion survey in a major city. Part of the research plan calls for describing and comparing the opinions of four different ethnic groups: African Americans, Asian Americans. European Americans, and Native Americans. For a total sample of 300. the researcher selects 75 participants from each of the four predetermined subgroups.
