1. Check THREE variables that should be controlled (kept the same) in order 1 point to make the tests and data from this activity more fair and accurate. *

1. The time each exercise is performed at each station.

2. The intensity and type of exercise performed at each station.

3. The type of data collected at all of the stations.

4. The type of sensor used at all of the stations.

5. The same students should be tested at all of the stations.

6. Only six students should be tested at each station.