Emily is developing a sampling plan for a study of vodka consumption among college students at Murray College. She wants to ensure that students from each class level are represented. She also wants to be able to compare students who are members of Greek organizations to non$-$Greeks. Finally, she wants to consider patterns by gender. Emily plans to cross$-$reference Murray College's student directory with membership lists from each Greek organization on campus to develop a sample frame.

In the alcohol consumption study at Murray College, students who do not belong to Greek organizations outnumber those who do by $8$ to $6.$ If Emily draws the study sample such that $50\%$ of the sample is made up of non$-$Greek$-$affiliated students and $50\%$ of Greek$-$affiliated students, what type of sampling has she used?

Question $14$Select one:

a$.$

Simple random

b$.$

Quota

c$.$

Systematic

d$.$

Proportionate stratified

e$.$

Disproportionate stratified