In order to test reading abilities of fifth grade children, a representative sam

Question

In order to test reading abilities of fifth grade children, a representative sample of 120,000 fifth graders is to be selected in a heavily populated state. It is known that 60% of the children in that state live in urban areas, 25% live in suburban areas, and 15% live in rural areas. It is also known that reading ability levels are different in these three types of areas. Which of the following is the most appropriate sampling procedure to use? Draw a random sample of 40,000 in each of the three categories. Draw random samples of 72,000 urban children, 30,000 suburban children, and 18,000 rural children. Perform a random sampling of the schools, including enough classes so as to have 120,000 children in the sample. I only II only III only I and II are both equally appropriate II and III are both equally appropriate

Explanation / Answer

D) I and II are both equally appropriate

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