Answer
Treatment group: Jake, Maria, Mike, Lucy, Ron, Adam, Bridget, Carlos, Steve
Control group: Susan, Vanessa, Rick, Dan, Kate, Pete, Judy, Mary, Connie
I used Python's "random" library to do the assignments and then wrote a function.
Work Step by Step
This is the Python code I wrote. There are many ways to do this, however.
import random
subjects = ['Jake', 'Maria', 'Mike', 'Lucy', 'Ron', 'Adam', 'Bridget', 'Carlos', 'Steve', 'Susan', 'Vanessa', 'Rick', 'Dan', 'Kate', 'Pete', 'Judy', 'Mary', 'Connie']
treatment = random.sample(subjects, 9)
control = [x for x in subjects if x not in treatment]
print("Treatment group:", treatment)
print("Control group:", control)
