a scientist studied the pulse raes of nonathletes vs. athletes. he hypothesizes that athletes have a better cardiovasular fitness than nonathletes. pulse rate of all participants will be measured before and after five minutes of aerobic activity.
what is the independent variable?
what is the dependent variable?
Make a prediction about the pulse rates of athletes vs. nonathletes.
2006-08-30 09:10:30 · 2 answers · asked by Anonymous in Education & Reference ➔ Homework Help
the dependent variable is the five minutes of aerobic exercise, because that is what you controlled. The independent variable is the difference between the before and after, because this variable you cannot control.
I bet the pulse rates would be higher on the non-athletes because they do not exercise regularly, so their heart would pump harder and faster because their bodies aren't used to it.
2006-08-30 09:26:37 · answer #1 · answered by KC_Meag42 5 · 0⤊ 0⤋
Independent is the time
dependent is the heart rate
before Athlete: 52 Non athlete: 62
After: Athlete: 145 Non Athlete 165
2006-08-30 16:29:24 · answer #2 · answered by odu83 7 · 0⤊ 0⤋