Question 1182874
half-interval for 90% confidence is t(df=28, 0.95)=1.701*s/sqrt(n)
=1.701*7.9/sqrt(29)
=2.495  (decimal blood pressures aren't used, if done without a catheter in the artery, have at least 2-3 mm  error in precision or repeatability, and the final answer should be an integer; that is the physician in me speaking).
(53.305, 58.295) depression of BP in units mm Hg.