Provide a 95% CI for the mean change in heart rate after using the treadmill for 5 minutes. The subject also recorded his heart rate at baseline and 5 minutes after starting treadmill exercise (at a speed of 2.5 mph) in 2000. The data are shown in Table 8.38?

Table 8.38: Change in heart rate following treadmill use in 2000

 

Health Promotion

An individual has been exercising at a local gym for about 10 years. He always begins with a 10- to 15-minute session on the treadmill at a speed of 3.7 mph. During a 12-day period in 2010, he recorded his heart rate before using the treadmill and after 5 minutes of use. The data are shown in Table 8.37.

Table 8.37: Change in heart rate following treadmill use in 2010

 

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Heart rate Hoart rate Baseline Day 5 min Day Baseline 5 min 84 87 86 92 87 92 88 93 3 90 93 84 90 94 98 86 92 5 98 100 10 98 104 Mean 89.5 94.1 sd 5.4 5.1 Heart rate Day Baseline 5 min Change 1 85 103 18 77 92 15 3 81 97 16 81 96 15 74.5 93 18.5 83.75 96 12.25 76.5 93 16.5 77.75 94 16.25 79.25 90 10.75 10 84.25 99 14.75 11 76.5 94 17.5 12 84.75 97 12.25 Mean 80.1 95.3 15.2 sd 3.7 3.5 2.4