43. A question of medical importance is whether jogging leads to a reduction in one’s pulse rate. To test this hypothesis, 8 nonjogging volunteers agreed to begin a 1-month jogging program. After the month their pulse rates were determined and compared with their earlier values. If the data are as follows, can we conclude that jogging has had an effect on the pulse rates?

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Subject 1 2 3 4 5 6 7 8 Pulse Rate Before 74 86 98 102 78 84 79 70 Pulse Rate After 70 85 90 110 71 80 69 74