The researcher hypothesizes that H1a: adolescents in single-parent headed households do not perform as well on the SAT compared to those in duo-headed households. Furthermore, H1b: this relationship can be explained by the fact that duo-headed households have more economic resources (which can be spent on SAT prep courses, tutors, and is associated with living in better school districts). In this case, the researcher hypothesizes that economic resources links family structure to SAT scores. This means that economic resources is a(n)

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