Astudent project measured the increase in the heart rates of fellow students when they stepped up and down for three minutes to the beat of a metronome.
the step was either 5.75 inches or 11.5 inches high and the metronome beat was either 14, 21, or 28 steps per minute.
five students stepped at each combination of height and speed.
1)what are the subjects?
2)what are the factors?
3)what are the treatments?
4)what is the reasonable variable?