That is a weak looking trend and doesn't isolate intelligence very well. In a better statistical model it would adjust for things like age, or number of people

That is a weak looking trend and doesn't isolate intelligence very well. In a better statistical model it would adjust for things like age, or number of people with computers by percentage etc. Even if there was a statistical model which was reasonable it could be entirely due to the type of ad. I know I don't click on most ads because they are for things like get rich quick or or online MBA programs or other dumb stuff