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Hypothesis

A) Analyse the data below to test the hypotheses that there are no differences between the two groups of subjects in terms of their walking time to exhaustion (in seconds) and ratings of perceived exertion (RPE) after 8 minutes of walking.

Healthy subjects
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Time 1014 684 810 850 840 978 1002 860 900 930 920
RPE 10 14 15 14 14 12 12 13 14 13 12

CHD patients
-----------------------------------------------------------------------------------------------------------------------------
Time 864 720 638 708 786 640 800 750 594 750 725
RPE 25 16 16 14 13 16 12 14 17 13 14
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N.B. Your analysis should consider appropriate diagnostic tests and the risk of committing a Type I error.

b) The CHD patients were measured 1 week later in terms of their treadmill exercise time (see re-test data below). Assess the hypothesis that there is no difference between the repeated measurements.

CHD patients (re-test)
-------------------------------------------------------------------------------------------------------------------------------
Time 880 700 650 720 800 635 830 775 630 755 780

Solution Summary

a) Analyse the data below to test the hypotheses that there are no differences between the two groups of subjects in terms of their walking time to exhaustion (in seconds) and ratings of perceived exertion (RPE) after 8 minutes of walking.

Healthy subjects
---------------------------------------------------------------------------------------------------------------------------
Time 1014 684 810 850 840 978 1002 860 900 930 920
RPE 10 14 15 14 14 12 12 13 14 13 12

CHD patients
-----------------------------------------------------------------------------------------------------------------------------
Time 864 720 638 708 786 640 800 750 594 750 725
RPE 25 16 16 14 13 16 12 14 17 13 14
------------------------------------------------------------------------------------------------------------------------------

N.B. Your analysis should consider appropriate diagnostic tests and the risk of committing a Type I error.

b) The CHD patients were measured 1 week later in terms of their treadmill exercise time (see re-test data below). Assess the hypothesis that there is no difference between the repeated measurements.

CHD patients (re-test)
-------------------------------------------------------------------------------------------------------------------------------
Time 880 700 650 720 800 635 830 775 630 755 780

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