A study on exercise and heart health included an experiment where the relationship between exercise intensity and heart rate was analyzed. Which of these is most likely to produce inconsistent results in the study?
A using repeated trials
B including a wide range of subject ages
C including computer monitoring of exercise intensity
D including many people in each trial

Question

A study on exercise and heart health included an experiment where the relationship between exercise intensity and heart rate was analyzed. Which of these is most likely to produce inconsistent results in the study?
A using repeated trials
B including a wide range of subject ages
C including computer monitoring of exercise intensity
D including many people in each trial

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