What kind of associations do you find if you compare the data set of IQ vs. GPA with the data set of IQ vs. SAT? Are GPAs and SAT scores correlated? Explain.

Answer:

Both data sets (IQ vs. GPA and IQ vs. SAT) show a positive correlation and a strong association. Since IQ scores are positively correlated with both GPAs and SAT scores, it is likely that GPAs and SAT scores are also positively correlated with each other because they are both linked to the same common variable.