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) was measured for each of 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 a. the volume of oxygen consumed at rest. b. the volume of oxygen consumed while running. c. there is no explanatory variable in this study The scatterplot suggests a. there is no association between the volume of oxygen consumed at rest and while running. b. there is a positive association between the volume of oxygen consumed at rest and while running. c. there is a negative association between the volume of oxygen consumed at rest and while running.

Explanation / Answer

4)Explanatory variable means Independent Variable->Variable on x axis

Hence Ans->Volume consumed at rest

5)Clearly there is a positive trend in the scatter plot, we do see that as x increases, y does increase.

Hence Ans->There is a positive association between the volume of oxygen consumed at rest and while running.

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