A Researcher Divides the City of Flint, Michigan, into 500

A researcher divides the city of Flint, Michigan, into 500 blocks of 10 households each. She requires a sample of 400 households. She selects a sample by randomly selecting 100 blocks and randomly selecting 4 households per block. This is an example of .

A) systematic sampling
B) two-stage area sampling
C) probability-proportional-to-size sampling
D) one-stage area sampling
E) sequential sampling

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