In a statistics class taught by one of the authors, students took their pulses before and after being frightened. The frightening event was having the teacher scream and run from one side of the room to the other. The pulse rates (beats per minute) of the women before and after the scream were obtained separately and are shown in the table. Treat this as though it were a random sample of female community college students. Test the hypothesis that the mean of college women's pulse rates is higher after a fright, using a significance level of 0.05. See page 432 for guidance.

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Women Pulse Before Pulse After Women Pulse Before 84 80 68 60 68 68 Pulse After 64 100 80 60 92 80 68 68 112 84 68 104 92 72 80 92 76 72 80