1. It was thought that a program of regular, moderately strenuous exercise could benefit patients who had a previous myocardial infarction. Eleven subjects participated in a study to test connection. Before the program was begun, the working capacity of each person was determined by measuring the time it took to reach a heart rate of 160 beats per minute while walking on a treadmill. After 25 weeks of controlled exercise, the treadmill measurements were repeated and the differences in times for each subject recorded. Calculate the Mean, Std. Deviation, and Variance for both the pre and post test using the following data: (copy and paste test output results in your submitted document)

Pretest Posttest 7.6 14.7 9.9 14.1 8.6 11.8 9.5 16.1 8.4 14.7 9.2 14.1 6.4 13.2 9.9 14.9 8.7 12.2 10.3 13.4 8.3 14.0