Cardiorespiratory fitness is widely recognized as a major component of overall p
ID: 3224677 • Letter: C
Question
Cardiorespiratory fitness is widely recognized as a major component of overall physical well-being. Direct measurement of maximal oxygen uptake (V02max) is the single best measure of such fitness, but direct measurement is time-consuming and expensive. It is therefore desirable to have a prediction equation for V02max in terms of easily obtained quantities. A sample is taken and variables measured are age (years), time necessary to walk 1 mile (mms), and heart rate at the end of the walk (bpm) in addition to the V02 max uptake. The following output is from a multiple regression. Interpret the slope of the HR variable. 1) When HR decreases by 1 bpm, V02 increases by 0.485 L/mm, holding all other variables constant. 2) When HR increases by 1 bpm, V02 increases by 0.485 L/min, holding all other variables constant. O 3) When HR increases by 0.485 bpm, V02 increases by 1 L/min, holding all other variables constant. 4) When HR increases by 1 bpm, V02 decreases by 0.485 L/mm, holding all other variables constant. 5) We do not have enough information to say.Explanation / Answer
4) is the right interpreation of the answer.
HR coefficient is >0 and it is .485
So, per bpm increase there isincrease of .485