Which of the following is a potential "third variable" that might explain the correlation between wealth and happiness across countries?

Question

Quizplus · Accepted Answer

All of these variables (civil rights, health care, and education) have been shown to have strong correlations with both wealth and happiness. Therefore, any of these variables could potentially be a third variable that is driving the correlation between wealth and happiness across countries.

Which of the Following Is a Potential "Third Variable" That