Cardiorespiratory fitness is widely recognized as a major component of overall p
ID: 3322777 • Letter: C
Question
Cardiorespiratory fitness is widely recognized as a major component of overall physical well-being. Direct measurement of maximal oxygen uptake (VO2max) 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 VO2max in terms of easily obtained quantities. A sample is taken and variables measured are age (years), time necessary to walk 1 mile (mins), and heart rate at the end of the walk (bpm) in addition to the VO2 max uptake. The equation from a multiple regression is (V02) = 0.093*(age) + 0.257*(HR) + 0.015*(time) + 2.804. If a person is 32.402 years old, has a heart rate of 113.41 bpm, a walking time of 12.267 minutes, and a maximum oxygen intake of 21.386 L/min, the residual would be -13.7618. What is the best interpretation of this residual? Question 29 options: 1) The heart rate is 13.7618 bpm less than what we would expect. 2) The max oxygen intake is 13.7618 L/min greater than what we would expect. 3) The heart rate is 13.7618 bpm larger than what we would expect. 4) The max oxygen intake is 21.386 L/min less than what we would expect. 5) The max oxygen intake is 13.7618 L/min less than what we would expect.
Explanation / Answer
If you have a negative value for a residual it means the actual value was LESS than the predicted value
5) The max oxygen intake is 13.7618 L/min less than what we would expect. is correct