A physical therapist wants to investigate whether a new exercise program reduces the pulse rate of subjects. She randomly selects 10 women to participate in the study. Each subject is asked to step up and down on a 6-inch step for 3 minutes. Her pulse (in beats per minute) is then recorded. After a 10-week training program, the pulse is again measured with the same technique. The results are presented in the following table:

Is the exercise program effective at the a = 0.05 level of significance?

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Woman Before After 136 Woman Before After 112 1 128 113 111 120 89 98 129 129 103 122 102 143 103 148 10 122 115 103 110