1. (A) Here are heart rates for a sample of 30 students before and after a class
ID: 3158598 • Letter: 1
Question
1. (A) Here are heart rates for a sample of 30 students before and after a class break.
Heart Rate Before and After Class Break
Calculate the test statistic. (Round your t-value to 3 decimal places. Negative value should be indicated by a minus sign.)
Student Before After 1 60 62 2 70 76 3 77 78 4 80 83 5 82 82 6 82 83 7 41 66 8 65 63 9 58 60 10 50 54 11 82 93 12 56 55 13 71 67 14 67 68 15 66 75 16 70 64 17 69 66 18 64 69 19 70 73 20 59 58 21 62 65 22 66 68 23 81 77 24 56 57 25 64 62 26 78 79 27 75 74 28 66 67 29 59 63 30 98 82Explanation / Answer
Student Before After before after 1 60 62 xbar 68.13 69.63 2 70 76 SD 11.46 9.60 3 77 78 n 30 30 4 80 83 5 82 82 6 82 83 t = ( 68.13 - 69.63) / [ srqt ( 11.46^2 + 9.60^2 / 30 ) ] 7 41 66 t = -0.55 8 65 63 9 58 60 10 50 54 11 82 93 12 56 55 13 71 67 14 67 68 15 66 75 16 70 64 17 69 66 18 64 69 19 70 73 20 59 58 21 62 65 22 66 68 23 81 77 24 56 57 25 64 62 26 78 79 27 75 74 28 66 67 29 59 63 30 98 82
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