A random sample of 10 young men was taken and the heart rate (HR) of each young man was measured before and after taking a cup of caffeinated coffee. The results are (beats/min.) Use the information in the table to answer the questions. Subject HR before HR after 1 68 74 2 64 68 3 52 60 4 76 72 5 78 76 6 62 68 7 66 72 8 76 76 9 78 80 10 60 64 a) Does caffeinated coffee have any effect on the heart rate of young men? Let level α = 0.05. b) As a public health specialist, write a brief report explaining your results above

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