1. Aerobic fitness, measured by the ability to consume oxygen, relates to the he
ID: 3367213 • Letter: 1
Question
1. Aerobic fitness, measured by the ability to consume oxygen, relates to the heart, blood vessels and lungs working together to deliver oxygen-rich blood to the muscles during exercise. A high level of aerobic fitness is associated with lower risks of several diseases, including high blood pressure and coronary heart disease. In a study of aerobic fitness, a sample of 31 men involved in a physical fitness course at a university was randomly selected. The measurements included Oxygen: the oxygen intake rate (mi per kg body weight per minute), RunPulse: the heart rate while running. Our goal is to examine whether oxygen consumption is dependent upon the heart rate while running. The following is part of the SAS output: Intercept RunPulse 82.45825 -0.20680 15.04386 0.08852 5.48 -2.34 0001 0,0266 e. What is the estimated standard deviation of the random errors in the model? f. What is the correlation coefficient between oxygen consumption and hear rate while running?Explanation / Answer
From the given output of linear regression equation in SAS, we can interpret that:
1.) Standard deviation for random errors: 0.08852
2.) Correlation Coefficient is given as: -0.2069
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