TABLE 3.

Data analysis summary. The research questions, description, variables used, statistical test, and where to find the results are presented

Research question	To identify differences in:	Variables used	Statistical test	Results
RQ1: How do opportunity gaps vary across STEM courses among biological sciences majors?	Opportunity gaps across disciplines	Δ%AB, ΔGP, ΔNRR	Overall F-test	Table 5 and Supplemental Table S4
RQ2: How similar are these opportunity gaps across institutions?	Opportunity gaps across institutions	Δ%AB, ΔGP, ΔNRR	Overall F-test	Table 6 and Supplemental Table S5
	Discipline-specific opportunity gaps across institutions	Δ%AB, ΔGP, ΔNRR	Overall F-test	Supplemental Tables S6–S9
RQ3: What is the relationship between the observed opportunity gaps and discipline, institution, and course characteristics?	The distribution of disciplines across the clusters	Discipline	χ2 goodness of fit test	Table 8
	The distribution of institutions across the clusters	Institution	χ2 goodness of fit test	Table 8
	The distribution of student demographics across the clusters	Gender, PEER status, first-generation status, low-income status	Overall F-test	Table 8
	The distribution of enrollments across the clusters	Student enrollment	Overall F-test	Table 8