In addition to measuring the group of participants who joined a fraternity/sorority, dr. fletcher decides to give the same measure to another group of 55 participants who decided to not join a fraternity/sorority. this type of design is known as a(n):

the first two-party system consisted of the federalist party, who supported the ratification of the constitution, and the democratic-republican party or the anti-administration party (anti-federalists), who opposed the powerful central government, among others, that the constitution established when it took effect in