A medical team is studying the the ramifications of obesity in society. As part of this study, a control group of 31 people has been collected, and the resting heart rates (in beats per minute) has been measured in these subjects. The average heart rate in this control group is 62.6. The sample standard deviation for this group is 3.9. Calculate the 90% condence interval for the mean heart rate in the population. You may nd this Student's t distribution table useful. Give your answers to 2 decimal places. l l