<PRE><B>Question 1188605</B>
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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