A Researcher Divides the City of Flint,Michigan,into 500 Blocks of 10

Multiple Choice

A researcher divides the city of Flint,Michigan,into 500 blocks of 10 households each.He requires a sample of 400 households.He 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