The histograms show the distribution of heart rates of randomly selected males betweens the ages of 40 and 45 after 20 minutes of continuous exercise. The adult males were selected to use either a new elliptical machine (experimental group) or a tradiational machine.

The histograms show the distribution of heart rates of randomly selected males betweens the ages of 40 and 45 after 20 minutes of continuous exercise The adult class=


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