Is running on a treadmill for one hour or jumping rope for twenty minutes better at burning calories?
Which option below gives the most effective method at determining which treatment is better at burning calories?
Let students volunteer which group they want to go in and compare the results.
Randomly separate the group and have half of them jump rope for twenty minutes while the other half runs on the treadmill for an hour.
Randomly divide the subjects into three groups. The first group will jump rope, the second group will run on the treadmill for twenty minutes, and the third group will do neither of the activities.
Randomly select which activity the entire group does on the first day followed by the different activity on the second day.
Randomly separate the group and have half on them jump rope for twenty minutes the first day and then run for an hour the next day. The other group will run for an hour the first day and jump rope for twenty minutes the next.