Which pair of variables has a clear causal link?
*sales of hot dogs and cold coffee at a snack bar
*the number of road accidents and the number of vegetarians in a city
*the amount of snowfall and the number of wins for a hockey team
*the number of units sold by an appliance company and its annual revenues

Question

Which pair of variables has a clear causal link?
*sales of hot dogs and cold coffee at a snack bar
*the number of road accidents and the number of vegetarians in a city 
*the amount of snowfall and the number of wins for a hockey team
*the number of units sold by an appliance company and its annual revenues

henrietepurina · Answer

First and last. They are sales :)

anonymous · Answer

So A.?

kainui · Answer

@Brianna2013 What's a causal link? This is just saying one thing causes another. So if a bunch of prisons suddenly let all the prisoners out and at the same time there as an increase in crime, we could say that there was likely a causal link.

What about car accidents and number of vegetarians? Do vegetarians cause car accidents? I don't think so! Just reason them out, and ask yourself if they're related or not and if one might cause the other.