The volume of oxygen consumed (in liters per minute) while a person is at rest a

Question

The volume of oxygen consumed (in liters per minute) while a person is at rest and while he or she is exercising (running on a treadmill) were both measured for 50 subjects. The goal is to determine if the volume of oxygen consumed during aerobic exercise can be estimated from the amount consumed at rest. The results are plotted below.



In this study, the explanatory variable is:

the volume of oxygen consumed at rest. the volume of oxygen consumed while running. the measuring instrument used to measure the volume of oxygen consumed. It doesn't matter which is considered the response. Either variable is appropriate.

Explanation / Answer

In this study, the explanatory variable is:

the volume of oxygen consumed at rest.

Option a) is correct.

indpendent or explanatory variable is determined from x axis of scatterplot.

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