Question 1082860
This is a paired t-test with df=4
The differences are 25,29,38,-4,6
Here, a t-test is done with only df=4, but the variability is only in the BP for one person, not 5.
The critical value is |t|>2.776
the actual value is x bar=20.4, s=14.8
t=3.073
p-value is 0.037
This is significant at the 0.10 level.