Among the indicators of patient condition following pyloromyotomy (correction of stenotic pylorus)

in neonates is time (hours) to full feeding.4 A surgeon wants to place a 95% CI for mean time to full feeding. The surgeon has readings from n 5 20 infants. Some of the data are 3.50, 4.52, 3.03, 14.53,.... The surgeon calculates m 5 6.56 and s 5 4.57. What is the CI?