Question

Question 8 (1 point)

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 following output is from a multiple regression. Interpret the slope of the time variable.

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Question 8 options:

	1) When time increases by 1 minute, V02 decreases by 1.005 L/min, holding all other variables constant.
	2) When time decreases by 1 minute, V02 decreases by 1.005 L/min, holding all other variables constant.
	3) We do not have enough information to say.
	4) When time decreases by 1.005 minutes, V02 increases by 1 L/min, holding all other variables constant.
	5) When time increases by 1 minute, V02 increases by 1.005 L/min, holding all other variables constant.

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Answer 1

Ans:

When time increases by 1 minute, V02 decreases by 1.005 L/min, holding all other variables constant.