Discussion:
Q: The following data are the heart rates (in beats per minute) of 12 regular before and after chewing smokeless tobacco. Does chewing make a difference in heart rate? Also, is the test dependent or independent?
Subject 1 2 3 4 5 6 7 8 9 10 11 12
Rate Before 73 67 68 60 76 80 73 77 66 58 82 78
Rate After 77 69 73 70 74 88 76 82 69 61 84 80