5 points
A coach thinks a special sports drink will make his players stronger. He
creates two groups of 20 players and assigns each group the same task
(Each group are to lift 300 lbs.) Group A is given the special drink while
they work. Group B is not given the special drink. After an hour, the coach
counts how many players were able to lift 300 lbs. 15 players in Group A
were able to lift the 300 lbs. Only 5 players in Group B were able to lift the
300 lbs. In the above scenario, the control group is:
Group A
Group B