Which change in the sample selection procedure of a study involving continuous handrail support,oxygen uptake,and heart rate in women during submaximal step treadmill exercise would have the greatest impact on increasing the generalizability of the results?
A) Increasing the sample size
B) Including participants who smoke in the study
C) Having a true control group rather than having participants serve as their own controls
D) Expanding the sample population to include equal numbers of women who were moderately fit and highly fit
Correct Answer:
Verified
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