Question: Here are heart rates for a sample of 30 students before and after a class break.

Heart rate before and after class break

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 82

1. At α = .05, choose the appropriate hypothesis to test whether there was a significant difference in the mean heart rate. H ₀ : μ _d = 0 versus H ₁ : μ _d ≠ 0
   H ₀ : μ _d ≠ 0 versus H ₁ : μd = 0.
2. If t* > 2.045 or t* < –2.045, you: Fail to reject the null hypothesis

Reject the null hypothesis

c. t* = ___ -1.2557 ________

d. Your decision: Reject the null hypothesis OR Fail to reject the null hypothesis

e. p-value = ____ 0.2193 ________

f. At α = .05, was there a significant difference in the mean heart rate? Yes No

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