Question

SKILL BUILDER 2 Exercises 1.72 to 1.77 describe an association bet- ween two variables. Give a confounding variable that may help to account for this association. to 1.76 Air pollution is higher in places with a higher proportion of paved ground relative to grassy ground

Answer 1

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Lets say there is a variable: %age of city' total area in-habitated. This drives both : proportion of paved ground relative to grassy ground , and the air pollution ( since higher area in-habitated means more strain on the resources and thus more pollution.

Hence, this "%age of city' total area in-habitated" can be a latent/hidden variable which was responsible for increase in both the other variables i.e. lurking variable.