Use the given confidence interval to find the margin of error and the sample mean. 1.) (4.56 , 9.72)

Question

Use the given confidence interval to find the margin of error and the sample mean. 1.) (4.56 , 9.72)

Answer 1

(9.72- 4.56)/2 = 5.16/2

= 2.58 = margin of error

mean = 4.56+2.58 = 7.14

or

the average of endpoints of the interval

= (9.72+4.56)/2 = 14.28/2= 7.14

the interval = 7.14 +/-2.58