Question 627160
get the average of the lower and upper end to get the sample mean.
sample mean = {{{(37.8 + 38.8)/2}}} = 38.3
margin of error = sample mean - lower end = 38.3 - 37.8 = 0.5 or
margin of error = upper end - sample mean = 38.8 - 38.3 = 0.5
Answer: 0.5