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The cardiac output for those who exercise at rest (fig.3) was lower (5.15 L/min) than those who do not (5.9 L/min). When an unpaired t-test was performed, the p-value for this sample was 18 which is above .05 : thus it can be concluded that the change in cardiac output at rest between both groups was not statistically significant and does not support the hypothesis. The cardiac output for those who exercise at peak work rate(fig.3) was higher (19.5 L/min) than those who do not(16.4 L/min) as predicted by the hypothesis.When an unpaired t-test was performed, the p-value for these samples was .0014, therefore statistically