Sampling Methods and Study Validity
A city planner wants to study resident satisfaction with public transportation in a city where the population is geographically dispersed and neighborhoods have varying levels of access. The disadvantage of which sampling method would most significantly threaten the validity of this study?
A
Systematic sampling from a city-wide address database
B
Stratified random sampling by neighborhood
C
Cluster sampling with only downtown clusters selected
D
Multistage sampling beginning with random neighborhoods
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