SOLUTION: Here are heart rates for a sample of 30 students before and after a class break. At α = .05, was there a significant difference in the mean heart rate? (a) State the hypotheses. (

Question 1188605: Here are heart rates for a sample of 30 students before and after a class break. At α = .05, was there a significant difference in the mean heart rate? (a) State the hypotheses. (b) State the decision rule. (c) Solve the problem and show the output. Or show the process if you use hand-calculation. (d) Make a decision. (e ) Write up a few sentences to interpret and report this study like you would for a research paper. Follow the APA 7th edition format requirement. See https://my.ilstu.edu/~jhkahn/apastats.html for a useful guidance. (20 points)
before:
70,65,70,69,57,72,55,56,75,70,66,66,71,81,75,64,66,61,77,60,72,58,77,72,68,71,65,71,70,74
after:
83,75,66,78,95,80,76,80,65,61,95,81,59,77,80,85,63,69,75,73,80,75,77,81,68,73,84,65,71,86

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the mean is 7.667
s=11.96
use a paired t-test with df=29
calculator for this
t-test with data inputted
test mean of 0 (no difference)
t=3.51
p-value is 0.0014.
Ho:no difference between the HR before and after(A-B=0)
Ha: there is a difference
alpha=0.05 p{rejectHo|ho true}
test is a paired t (each student their own control)
reject Ho and conclude the heart rates remain elevated after the class break.

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