Having Found That People from Similar Socioeconomic Backgrounds Are More

Multiple Choice

Having found that people from similar socioeconomic backgrounds are more likely to become friends than people from different backgrounds, a researcher wanted to test the hypothesis that this effect is due to the fact that people from the same socioeconomic background are more likely to share similar attitudes. What could the researcher use to examine this hypothesis?

A) Coefficient of determination
B) Partial correlation
C) A scatterplot
D) Pearson correlation