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) = 0.054*(age) + 0.023*(HR) - 0.01*(time) + 6.892. If a person
is 48 years old, has a heart rate of 121 bpm, a walking time of 14
minutes, and a maximum oxygen intake of 20.131 L/min, the residual
would be 8.004. What is the best interpretation of this
residual?
Question options:
1)
The max oxygen intake is 20.131 L/min larger than what we would
expect.
2)
The max oxygen intake is 8.004 L/min less than what we would
expect.
3)
The max oxygen intake is 8.004 L/min larger than what we would
expect.
4)
The heart rate is 8.004 bpm less than what we would
expect.
5)
The heart rate is 8.004 bpm larger than what we would
expect.