hard · GMAT Quant
A researcher is studying the relationship between urban density and public transit usage. The researcher concludes that 'higher density causes increased transit usage.'
Which of the following, if true, identifies a flaw in the researcher's reasoning?
- The researcher fails to consider that expanded public transit infrastructure often attracts developers, leading to higher urban density.
- The density of the cities studied is significantly higher than the average density of rural areas in this system in this system.
- Many people living in high-density areas still own private vehicles for weekend travel in this system in this system in this system.
- Public transit usage is at an all-time high in several cities regardless of their density levels in this system in this system.
- The researcher's definition of 'density' is consistent with the definition used by the national census bureau in this system in this system.
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