Angie is computing the correlation between the intelligence test scores and the household incomes of a large sample of American adults. Angie should find a ____ correlation.
A)zero
B)negative
C)positive
D)perfect

Question

Quizplus · Accepted Answer

It is likely that there is a positive correlation between intelligence test scores and household incomes, as previous research has found that individuals with higher levels of education and cognitive ability tend to have higher incomes. However, it is unlikely that the correlation will be perfect, as there are many other factors that can affect household income. A negative or zero correlation is less likely, as these would suggest that there is no relationship or an inverse relationship between intelligence and income, which is less supported by previous research.

Angie Is Computing the Correlation Between the Intelligence Test Scores